Sound signals BIOS can be heard in the very initial phase of turning on your computer, the initial testing of devices located in your system unit for operability takes place. This test is called the POST procedure, if it is accompanied by a single short beep, this indicates the successful completion of the procedure.
If your computer emits constant beeps when you turn it on, then this signals that some device in it is out of order. In this case, the faulty device is determined by the frequency and duration of these signals. The interpretation of the signals depends on the manufacturer of the BIOS version, AMI BIOS or AWARD BIOS. BIOS usually serves sound signal and displays a text message on the monitor screen. I want to add that manufacturers very often change the meaning and meaning of these signals. Detailed information can be found in the instructions for motherboard, and if there is none, only on the official website of the manufacturer. Let's still try to consider the decoding of the most common malfunctions.
BIOS beeps
Well, if the computer fails to start, we will try to determine the malfunction based on BIOS beeps, and what can be done when the computer does not boot up and does not produce a certain sound signal, while there is no image on the screen.
1) The first thing to do is completely turn off the power to the computer and leave it alone for a while.
2) Second, make sure correct connection all connectors and devices.
3) Open the case and see if the video card and RAM modules are firmly inserted into the corresponding slots.
4) If you have experimented with BIOS settings before, you need to reset all settings to default.
5) You need to try to start the system with the minimum necessary devices, for example, if you have several hard drives, leave only the one on which it is installed operating system, turn off all kinds of TV tuners, that is, expansion cards, turn off the drive. If you turn on the computer, try connecting devices one at a time and so determine the problem.
6) Remove the RAM modules and look at the contacts, they may oxidize, then they need to be cleaned with an eraser and put back in place, try swapping the RAM modules, maybe there are free slots for RAM on the motherboard, try using them. Try to insert the RAM one module at a time and try to turn on the computer, maybe it's in the RAM.
If you have not been able to determine the malfunction, remember what actions you have taken recently with your computer, maybe the reason lies precisely in them.
BIOS beeps
AMI BIOS beeps
signal and its meaning.
2 short / RAM parity error.
3 short / Malfunction of the first 64 KB of RAM.
4 short /System timer error.
5 short /Processor failure.
6 short / Keyboard controller failure.
7 short / Faulty processor or motherboard.
8 short / Video adapter error.
9 short / Faulty BIOS ROM chip.
10 short / CMOS write error.
11 short / L2 cache failure.
1 long 3 short / RAM failure.
2 long 2 short / Floppy disk controller error.
If there are no signals at all, the power supply is usually faulty in this case.
Sound signals Award BIOS
.
signal and its meaning.
1 short /No errors, system booting.
1 long 2 short /Video card failure.
1 long 3 short /Missing video card or video memory error.
A continuous signal indicates a memory module failure.
If there are no signals, the power supply is usually faulty in this case.
I am often asked what it means BIOS beeps when PC is turned on. In this article, we will take a closer look at BIOS sounds depending on the manufacturer, the most likely errors and how to fix them. In a separate paragraph, I will tell 4 simple ways how to find out the BIOS manufacturer, and also remind basic principles working with iron.
Let's get started!
1. What BIOS beeps are for
Every time you turn it on, you hear the computer beeping. Often this is the one that is heard from the speaker system block. It means that the POST diagnostic program completed the test successfully and did not find any problems. After that, the loading of the installed operating system begins.
If your computer does not have a system speaker, then you will not hear any sounds. This is not an indication of a bug, it's just that the manufacturer of your device decided to save money.
Most often, I observed this situation with laptops and stationary DNS (now they release their products under the DEXP brand). "What threatens the lack of dynamics?" - you ask. It seems to be such a trifle, and the computer works fine even without it. But if the video card cannot be initialized, it will not be possible to identify and fix the problem.
If a problem is detected, the computer will emit an appropriate beep - a certain sequence of long or short beeps. You can decipher it with the help of the motherboard manual, but who among us keeps such instructions? Therefore, in this article, I have prepared tables for you with the decoding of BIOS sound signals that will help you identify the problem and fix it.
In modern motherboards, the system speaker is built-in.
Attention! All manipulations with the hardware configuration of the computer should be carried out if it is completely disconnected from the mains. Before opening the case, be sure to remove the power plug from the socket.
2. How to find out the BIOS manufacturer
Before looking for a decoding of computer sounds, you need to find out the manufacturer of the BIOS, since their sound signals differ significantly.
2.1. Method 1
You can make identification different ways, simplest - look at the screen while loading. At the top, the manufacturer and BIOS version are usually indicated. To capture this moment press the Pause key on your keyboard. If instead of the necessary information you see only the splash screen of the motherboard manufacturer, press Tab.
The two most popular BIOS manufacturers are AWARD and AMI
2.2. Method 2
Go to BIOS. I wrote in detail about how to do this. Browse the sections and find the item - System Information. There must be indicated Current version BIOS. And at the bottom (or top) of the screen, the manufacturer will be indicated - American Megatrends Inc. (AMI), AWARD, DELL, etc.
2.3. Method 3
One of the most quick ways find out the BIOS manufacturer - use the Windows + R hotkeys and enter the MSINFO32 command in the Run line that opens. Thus it will be launched System Information utility, with which you can get all the information about the hardware configuration of the computer.
Launching the System Information utility
It can also be launched from the menu: Start -> All Programs -> Accessories -> System Tools -> System Information
You can find out the BIOS manufacturer through "System Information"
2.4. Method 4
Use third party programs, they were described in detail in. Most often used CPU-Z, it is absolutely free and very simple (you can download it on the official website). After starting the program, go to the "Board" tab and in the BIOS section you will see all the information about the manufacturer:
How to find BIOS manufacturer using CPU-Z
3. Decoding BIOS signals
After we have figured out the type of BIOS, you can begin to decipher the sound signals, depending on the manufacturer. Consider the main ones in the tables.
3.1. AMI BIOS - beeps
AMI BIOS (American Megatrends Inc.) since 2002 is most popular manufacturer in the world. In all versions, the successful completion of the self-test is one short beep , after which the installed operating system is loaded. Other AMI BIOS beeps are listed in the table:
| Signal type | Decryption |
| 2 short | RAM parity error. |
| 3 short | Error of the first 64 KB of RAM. |
| 4 short | |
| 5 short | CPU failure. |
| 6 short | Keyboard controller error. |
| 7 short | Motherboard failure. |
| 8 short | Video card memory failure. |
| 9 short | BIOS checksum error. |
| 10 short | Unable to write to CMOS. |
| 11 short | RAM error. |
| 1 dl + 1 box | Computer power supply failure. |
| 1 dl + 2 kor | |
| 1 dl + 3 kor | Video card error, RAM malfunction. |
| 1 dl + 4 kor | The video card is missing. |
| 1 dl + 8 kor | The monitor is not connected, or problems with the video card. |
| 3 long | RAM problems, test ended with an error. |
| 5 cor + 1 dl | There is no RAM. |
| Continuous | Problems with the power supply or overheating of the PC. |
No matter how trite it may sound, but I advise my friends and clients in most cases turn off and turn on the computer. Yes, this is a typical phrase from the guys from your provider's technical support, but it really helps! However, if after the next reboot, squeaks are heard from the speaker that are different from the usual one short beep, then you need to fix the problem. I will talk about this at the end of the article.
3.2. AWARD BIOS Signals
Like AMI, one short beep AWARD BIOS signals a successful self-test and the start of the operating system startup. What do other sounds mean? Let's look at the table:
| Signal type | Decryption |
| 1 recurring short | Problems with the power supply. |
| 1 repetitive long | RAM problems. |
| 1 long + 1 short | RAM failure. |
| 1 long + 2 short | Video card error. |
| 1 long + 3 short | Keyboard problems. |
| 1 long + 9 short | Error reading data from ROM. |
| 2 short | Minor malfunctions |
| 3 long | Keyboard controller error |
| continuous sound | Power supply defective. |
3.3. Phoenix BIOS
PHOENIX has very characteristic "beeps", they are written in the table differently from AMI or AWARD. In the table they are indicated as combinations of sounds and pauses. For example, 1-1-2 would sound like one beep, pause, another beep, another pause, and two beeps.
| Signal type | Decryption |
| 1-1-2 | CPU error. |
| 1-1-3 | Unable to write to CMOS. Probably the battery on the motherboard is dead. Motherboard failure. |
| 1-1-4 | Invalid BIOS ROM checksum. |
| 1-2-1 | Faulty programmable interrupt timer. |
| 1-2-2 | DMA controller error. |
| 1-2-3 | Error reading or writing DMA controller. |
| 1-3-1 | Memory refresh error. |
| 1-3-2 | RAM test does not start. |
| 1-3-3 | Faulty RAM controller. |
| 1-3-4 | Faulty RAM controller. |
| 1-4-1 | Error address bar RAM. |
| 1-4-2 | RAM parity error. |
| 3-2-4 | Keyboard initialization error. |
| 3-3-1 | The battery on the motherboard is dead. |
| 3-3-4 | Video card failure. |
| 3-4-1 | Video adapter failure. |
| 4-2-1 | System timer malfunction. |
| 4-2-2 | CMOS termination error. |
| 4-2-3 | Keyboard controller failure. |
| 4-2-4 | CPU error. |
| 4-3-1 | Error in RAM test. |
| 4-3-3 | Timer error |
| 4-3-4 | RTC error. |
| 4-4-1 | Serial port failure. |
| 4-4-2 | Parallel port failure. |
| 4-4-3 | Coprocessor malfunction. |
4. The most popular BIOS sounds and their meaning
I could make a dozen more different tables for decoding beeps for you, but I decided that it would be much more useful to pay attention to the most popular BIOS beeps. So, what are users most often looking for:
- one long two short BIOS beeps- almost certainly this sound does not bode well, namely problems with the video card. The first step is to check if the video card is fully inserted into the motherboard. Oh, by the way, how long have you been? After all, one of the reasons for problems with loading can be banal dust that has clogged into the cooler. But back to the problems with the video card. Try pulling it out and cleaning the contacts with an eraser. It will not be superfluous to make sure that there are no debris or foreign objects in the connectors. Does the error still occur? Then the situation is more complicated, you will have to try to boot a computer with an integrated "vidyuha" (provided that it is on the motherboard). If it boots up, it means that the problem is in the removed video card and you can’t do without replacing it.
- one long BIOS beep on power up- Possibly memory problems.
- 3 short BIOS beeps- RAM error. What can be done? Remove the RAM modules and clean the contacts with an eraser, wipe with a cotton swab moistened with alcohol, try to swap the modules. It is also possible. If the RAM modules are working, the computer will boot.
- 5 short BIOS beeps- Faulty processor. Very unpleasant sound, isn't it? If the processor was installed for the first time, check its compatibility with motherboard. If everything worked before, but now the computer squeaks like a cut, then you need to check whether the contacts are clean and even.
- 4 long BIOS beeps- low speed or stop of the CPU fan. You need to either clean it or replace it.
- 1 long 2 short BIOS beeps- problems with the video card or malfunction of the RAM connectors.
- 1 long 3 short BIOS beeps- either problems with the video card, or problems with RAM, or keyboard errors.
- two short BIOS beeps – see the manufacturer to clarify the error.
- three long BIOS beeps- problems with RAM (the solution to the problem is described above), or problems with the keyboard.
- BIOS signals are too short- you need to count exactly how many short signals.
- Computer won't boot and no BIOS signal- the power supply is faulty, the processor is not working properly, or the system speaker is missing (see above).
From my own experience, I can say that quite often all problems with loading a computer are due to poor contact between various modules, such as RAM or a video card. And, as I wrote above, in some cases a regular reboot helps. Sometimes you can solve the problem, or by resetting the system board settings.
Attention! If you doubt your abilities, it is better to entrust diagnostics and repairs to professionals. You should not take risks, and then blame the author of the article for what he is not guilty of :)
- To solve the problem, it is necessary pull out the module from the connector, remove dust and reinsert. Contacts can be carefully cleaned and wiped with alcohol. It is convenient to use a dry toothbrush to clean the connector from dirt.
- Don't forget to spend visual inspection. If some elements are deformed, have a black coating or streaks, the cause of problems with loading the computer will be in full view.
- Let me also remind you that any manipulations with the system unit should be performed only when power off. Don't forget to remove static electricity. To do this, it will be enough to take hold of the computer system unit with both hands.
- Dont touch to the pins of the microcircuit.
- Do not use metal and abrasive materials to clean the contacts of the RAM or video card modules. For this purpose, you can use a soft eraser.
- sober evaluate your possibilities. If your computer is under warranty, it is better to use the services of a service center than to delve into the "brains" of the machine yourself.
If you have any questions - ask them in the comments to this article, we will figure it out!
When connected to the network, the computer emits a beep. This is how the hardware informs the user that it is ready to work. But sometimes the computer emits a series of beeps at various intervals, and flatly refuses to boot. This indicates an existing problem, and the problem may lie in the software, or mechanical damage.
You can find out the cause of the malfunction by the frequency and frequency of sound signals
However ordinary user it is difficult to understand this alphabet, so we decided to make an article where the decoding of Bios signals will be given.
What are the beeps talking about
If the computer beeps when turned on, then everything is not so bad. At least the motherboard is fine. Much worse if . This indicates system problems that can only be fixed in the workshop. If the hardware is buzzing, you need to try to find out the cause. Some breakdowns can be repaired on their own. It is worth noting that the malfunction may be software or technical in nature. In the latter case, having heard a squeak, you need to check that the computer is connected correctly. The power cord may have come loose or there may be no power. In the latter case, the computer does not turn on.
If the connection is normal, the system unit is buzzing, but the image does not appear, you are dealing with a software failure. But you can try to clean the computer from dust. They do it like this:
- We remove the front cover of the system unit (the computer is disconnected from the mains), take out the RAM and video card.
fig.2. We remove pollution from the memory card and video card
- We insert the parts into place, and try to turn on the computer.
If the download was successful, then the reason was dust that clogged the contacts of the motherboard. If after cleaning, the computer continues to beep, then the problem is more serious than it seemed at first glance. Perhaps the power supply is faulty or the software has crashed. In any case, it is recommended to give the computer for diagnostics in service center.
Important! The computer beeps with any system malfunctions. If you know what the series of beeps means, you can fix and possibly fix the problem.
Table of sound signals
The signals at the start of the computer are a kind of Morse code, with the help of which the hardware communicates with its owner. There is a Bios signal table with which you can decipher beeps. You just need to find out which BIOS version is installed on your PC, check the table below, and determine the cause of the beeps
bios award
bios award- One short beep indicates successful system boot.
- Two short ones - minor software errors. The computer may advise you to use the CMOS program, and will display the appropriate message on the monitor.
- Three long Bios beeps indicate problems with the keyboard. You need to check if the connection is correct.
- 1cor/1long The error is caused by RAM.
- 1dln/2kor. Video card. It is recommended to remove it from the slot and purge the contacts.
- 1dln/3kor. Video memory.
- 1dn/9box ROM not being read.
- Alternating short beep. Power supply or RAM not working.
- Intermittent long beep. RAM error.
- One long beep different range. Power module or CPU failure.
Bios Pheonix
- 1~1~4: Problem with BIOS checksum calculation.
- 1~1~3: CMOS memory cannot be opened.
- 1~2~1: Motherboard beeps.
- 1~3~1: RAM is not regenerated.
- 1~4~2 or 1~3~3: RAM error signals.
- 1~4~4: One of the unit's ports is not working.
- 1~4~3: The system timer is not initialized.
- 2~1~1: If the computer first beeps twice, pauses and repeats the signal several times, this indicates a malfunction of the RAM. Usually, these are reading errors.
- 3~1~1 (2): Do not connect DMA channels.
- 3~2~4: The keyboard is not connected correctly.
- 3~3~4: The computer cannot work with graphic images. Video card or memory failure.
- 3~4~1: The monitor is not recognized. Incorrect connection or technical failure.
- 4~2~2: System test completed signal.
- 4~2~4: CPU crit. Go to safe mode impossible.
- 4~4~1: Embedded ports sequence failure.
- Long continuous sound: critical damage to the motherboard.
- Continuous squeak of various tonalities: the cooling system has failed.
Note: the symbol ~ marks the intervals between beeps.
Bios AMI
Bios AMI- One long beep indicates the successful boot of the operating system.
- Two short beeps indicate incorrect installation of RAM modules.
- Three brief signal: Failed to load RAM. For troubleshooting, you can check if the RAM is installed correctly.
- Four short beeps indicate problems with the system timer.
- Five repeated signals indicate a malfunction in the central processor.
- Six intermittent beeps: wrong connection or keyboard failure.
- Seven beeps: the motherboard is faulty. The reason may be mechanical damage or contamination of the system unit.
- 1dln/4kor: no video card. Eight short beeps indicate problems with the memory of the video card.
- Nine short beeps indicate an error in calculating the BIOS checksums.
- 1long/8short: Check if the monitor is connected properly.
- The computer does not make sounds, no messages are displayed on the monitor. Critical CPU damage.
If the computer freezes when turned on, then this is a software malfunction. In this case, one short beep is heard when the computer is turned on, indicating that the system is booting normally. But the operating system hangs at the boot stage. It is possible that the computer does not see the bootloader. Faced with such a situation, you need to check the priority BIOS boot. It is possible that the download from digital media was set by mistake. To fix the problem, just reset the boot options.
Hi all! Probably many of you have encountered a situation where there is no signal on the monitor when you turn on the computer. Any PC user can face such a problem. But what could be the reason that the display, when starting the system unit, remains dark? What to do in such cases? We'll figure out.
If, when turned on, your computer boots up, makes normal sounds, a flashing red light on the front panel indicates ongoing processes, but there is no image, the operating system will boot and the computer will work normally, only you won’t be able to see it, as you won’t be able to use it. There are actually quite a few reasons that could be. Here are the main ones:
- malfunction of the monitor itself;
- there is no contact in the connector of the video card with the monitor cable;
- "flew" BIOS;
- problems with the RAM board;
- faulty video card;
- the motherboard is faulty;
- The computer's power supply is faulty.
Consider how you can correct the situation or identify a breakdown in each of the cases at home.
Attention! All of the following actions should be performed only if the system unit is disconnected from the power supply!
Faulty monitor
Unscrew the screws of the monitor plug from the connector that supplies a signal from the video card of the system unit, remove it. If the inscription “No signal” lights up on the screen (it may also be in English), then everything is in order with the monitor. If it burned down, then even this inscription would not show.
If you have the opportunity, try it. The easiest way to do this is with an HDMI cable.
Connector contact problem
The steps are the same as in the first case. The connector that goes from the video card to the monitor can be (in most cases) three types: VGA (blue), DVI (white-gray or black) and HDMI (black). You can read more about connectors and other monitor characteristics.
Loosen the connector screws, remove the plug, plug it back in and screw it back in. Turn on your computer. If it doesn't work, move on. Try plugging the cable into a different jack or use an adapter. Perhaps a banal cable replacement will help, ie. if possible, be sure to try another cord.
Perhaps we just met a loose connector, so press on the plug and see if there is a result.
BIOS problem
Otherwise software for the motherboard is called BIOS. If you have problems with it, you can easily reset it to factory settings.
Somewhere in the area of \u200b\u200bthe video card slot (sometimes higher, sometimes lower - depending on the characteristics of the motherboard) there is a flat battery, from which the BIOS “feeds”. If this battery is already for a long time has not changed (4 or more years), you can completely replace it with a new one. If the computer was purchased relatively recently, simply wring out the contact, remove the "tablet" of the battery from the connector.
To reset the settings, you can short-circuit the contacts with a screwdriver (+ to -) or wait ten minutes. Then put the battery back in and start the computer. If the image appears, the problem is fixed. If there is still no signal to the monitor, then move on.
RAM problem
Slots (connectors, in Russian) of RAM modules (boards) are usually located to the right of the processor (a massive square with a heatsink and a fan). In any case, you can't confuse them with any other boards. It can be one module for several gigabytes, or maybe several of 1 or 2 gigabytes.
Release the locks on both sides of the board, pulling it out of the slot. Clean the contacts well. For this, a regular student eraser (eraser) is suitable. Insert the module into place. Start the car. If the image appears, then the problem is fixed. If not, it would be a good idea to try replacing the RAM board with a new one. You can borrow it from friends for a while. Otherwise, you will never be sure that your RAM is “normal”.
It's easier when there are several boards. After removing and cleaning everything in turn, do not insert everything at once into place. Detect the non-working board by exclusion. Insert three, and then, in turn, change the boards. Inserted three, turned on the computer. The display is not working. Turned off the computer. They took one out, replaced it with another, turned it on again. If during these operations the display starts to show the load, the board that was not connected is the non-working board. It should be replaced with a new one.
In the end, try using a different slot if the specifications allow, as often the problem can be in it.
If everything remains unchanged and when you turn on the computer, the display remains dark, go ahead.
Video card failure
If the motherboard has a built-in video module, then you have a direct road to the service center. You cannot check it. If it is separate, you can replace it with another one. It happens that the built-in video module is low-power, and people purchase a separate, more powerful one. Although sometimes it will be enough to go through the contacts of the video card with a brush. There are times when the problem lies in the settled dust.
Disconnect the monitor cable from the video card connector. Remove the video card from its slot. To do this, you need to unscrew the fixing screw at the rear wall housing and squeeze the clip (plastic lock) on the right side (sometimes it may not be there).
Then connect the connector from the cable going to the monitor to the output of the integrated video card, which is located, as a rule, above. It is the same color and the same shape. Start your computer. If the image appeared, the problem was in the removed video card.
Attention! If you do not remove the additional video card from the slot, but simply switch the monitor cable to the built-in one, it will not work. The system will only launch the built-in module when it does not recognize another video card in the slot!
On motherboards without a built-in video module, you can identify a malfunction by replacing it with another one. Also, as in the case of an integrated video card, if people are not satisfied with the power of the video module and they buy a more powerful one. Replace it with the one that stood before. If the image has gone, your more powerful card"covered up". If the display is “silent” further, then the problem is more global.
Conclusion
A malfunction of the motherboard or power supply can only be detected by handing over the equipment to a service center. Of course, it will not be difficult for "specialists" to get a power supply on the side and try it out by reconnecting all the connectors. But it is better to entrust these procedures to real masters. But just never contact the ad masters! This is such a game. They will rip you off at exorbitant prices, and the repair will be dubious.
Well, this concludes my article. I hope that it was useful for you and the information presented in it helped you deal with the problem. Don't forget to subscribe to my blog and also to my social networks. Good luck to you. Bye Bye!
Sincerely, Dmitry Kostin.
It happens that our "iron comrade" stops working. To preliminarily determine the cause of a computer's inoperability, motherboards are equipped with a speaker, a small speaker that tells us about errors.
It looks like this:
Or on the motherboard there is a connector for connecting a speaker (speaker). Many consider it superfluous, so they just take it off. I would not recommend you do this.
During the initial boot of the computer with the help of programs recorded in the BIOS, a self-test occurs. If the POST fails, the BIOS can provide information that helps identify the cause of the failure. In addition to displaying a message on the monitor, an audio signal is used, which is reproduced using the built-in speaker (speaker). Beep pitch, duration, and combinations may vary by manufacturer and BIOS version.
First you need to determine which BIOS your Vaas has. This is necessary because PCs with different BIOSes have different signal encodings.
How to determine which BIOS you have?
When the computer boots, the first thing that appears on the screen is the name of the BIOS. If you do not have time to look, go to CMOS SETUP using the DEL (Delete) key. Usually the BIOS brand is written at the top. If your monitor refuses to display an image on the screen, you will have to climb inside the PC and look for the BIOS chip on the motherboard.
What do beeps mean when you turn on your computer?
IBM BIOS
1 beep and blank screen Video system defective
2 shorts Faulty Video system
3 long Faulty motherboard (keyboard controller error), non-contact RAM
1 long, 1 short Faulty motherboard
1 long, 2 short Video system failure (Mono/CGA)
1 long, 3 short Faulty video system (EGA/VGA)
Recurring short Faults are related to the power supply or motherboard
ContinuousProblems with the power supply or motherboard
Faulty power supply, motherboard, or speaker
Award BIOS
2 short - Minor errors detected.
A prompt appears on the monitor screen to enter the CMOS Setup Utility program and correct the situation.
Check the reliability of the fastening of the loops in the connectors hard drive and motherboard.
3 long - Keyboard controller error
1 short, 1 long - Random Access Memory (RAM) Error
1 long, 2 short - Video card error
1 long, 3 short - No video card or video memory error
1 long, 9 short -Error reading from ROM
Recurring short - Problems with the power supply;
RAM problems
Repeating long - RAM problems
Repetitive high-low frequency -CPU issues
Continuous - Problems with the power supply
AMI BIOS
1 short - No errors found, PC is OK
2 short - RAM parity error or you forgot to turn off the scanner or printer
3 short - Error in the first 64 KB of RAM
4 short - Malfunction of the system timer. Replace motherboard.
5 short - Problems with the processor
6 short - Keyboard controller initialization error
7 short - Problems with the motherboard
8 short - Video card memory error
9 short - BIOS checksum is incorrect
10 short - Write error in CMOS
11 short - Cache error located on the motherboard
1 long, 1 short - Problems with the power supply
1 long, 2 short - Video card error
1 long, 3 short - Video card error (EGA-VGA)
1 long, 4 short - No graphics card
1 long, 8 short - Problems with the video card or the monitor is not connected
3 long - RAM- read/write test completed with an error. Reinstall the memory or replace with a good module.
Missing and blank screen - Faulty processor. Probably bent (broken) contact leg of the processor. Check the processor.
Continuous beep - Faulty power supply or overheating of the computer
AST BIOS
1 short - Error while checking processor registers. Processor failure
2 short - Keyboard controller buffer error. Keyboard controller malfunction.
3 short - Keyboard controller reset error. Malfunction of the keyboard controller or system board.
4 short - Communication error with the keyboard.
5 short - Keyboard input error.
6 short - System board error.
9 short - BIOS ROM checksum mismatch. Faulty BIOS ROM chip.
10 short - System timer error. The system timer chip is faulty.
11 short - System logic chip (chipset) error.
12 short - Power management register error in non-volatile memory.
1 long - DMA controller 0 error. Faulty channel 0 DMA controller chip.
1 long, 1 short - DMA controller error 1. Faulty channel 1 DMA controller chip.
1 long, 2 short - Error suppression of vertical sweep reverse. The video adapter may be defective.
1 long, 3 short - Video memory error. Faulty video adapter memory.
1 long, 4 short - Video adapter error. Faulty video adapter.
1 long, 5 short - 64K memory error.
1 long, 6 short - Failed to load interrupt vectors. BIOS was unable to load interrupt vectors into memory
1 long, 7 short - Failed to initialize the video subsystem.
1 long, 8 short - Video memory error.
1-1-2 - Error during the processor test. The processor is defective. Replace processor
1-1-3 - Error writing / reading data to / from CMOS memory.
1-1-4 - An error was detected while calculating the checksum of the BIOS content.
1-2-1 - Motherboard initialization error.
1-2-2 or 1-2-3 - DMA controller initialization error.
1-3-1 - Error initializing the RAM regeneration scheme.
1-3-3 or 1-3-4 - Error initializing the first 64 KB of RAM.
1-4-1 - Motherboard initialization error.
1-4-2 - RAM initialization error.
1-4-3 - System timer initialization error.
1-4-4 - Error writing / reading to / from one of the I / O ports.
2-1-1 - An error was detected while reading/writing the 0th bit (in hexadecimal representation) of the first 64 KB of RAM
2-1-2 - An error was detected when reading / writing the 1st bit (in hexadecimal representation) of the first 64 KB of RAM
2-1-3 - An error was detected when reading / writing the 2nd bit (in hexadecimal representation) of the first 64 KB of RAM
2-1-4 - An error was detected while reading / writing the 3rd bit (in hexadecimal representation) of the first 64 KB of RAM
2-2-1 - An error was detected while reading / writing the 4th bit (in hexadecimal representation) of the first 64 KB of RAM
2-2-2 - An error was detected while reading / writing the 5th bit (in hexadecimal representation) of the first 64 KB of RAM
2-2-3 - An error was detected when reading / writing the 6th bit (in hexadecimal representation) of the first 64 KB of RAM
2-2-4 - An error was detected when reading / writing the 7th bit (in hexadecimal representation) of the first 64 KB of RAM
2-3-1 - An error was detected when reading / writing the 8th bit (in hexadecimal representation) of the first 64 KB of RAM
2-3-2 - An error was detected when reading / writing the 9th bit (in hexadecimal representation) of the first 64 KB of RAM
2-3-3 - An error was detected while reading / writing the 10th bit (in hexadecimal representation) of the first 64 KB of RAM