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Award bios codes
1 Long Beep: Memory problem or Power problem
Explanation: There is a failure of some sort related to the system memory.Or your PSU aint supplying the power
Diagnosis: The first bank of memory probably has a failure of some sort; this is usually just a physical problem such as an incorrectly inserted module, but may also mean a bad memory chip in a module. It is possible that there is a failure related to the motherboard or a system device as well. Check PSU voltage and output.
Recommendation:
When there is an apparent failure of the system memory, there are a myriad of different possible causes. The most common causes of memory failure (or apparent failure) vary greatly depending on whether the memory is in an existing system or in one that was just assembled or recently upgraded. This is because memory failure in a new system is more often than not due to misconfiguration or using the wrong type of memory, while in a system where the memory once worked, it is more likely that the memory itself has gone bad.
Get a stronger PSU.
1 Long, then 2 Short Beeps: Video error
Explanation: The BIOS is unable to access the video system in order to write any error messages to the screen.
Diagnosis: This is usually caused by a problem with the video card, or the memory on the video card. It can also be a motherboard issue.
1 Long, then 3 Short Beeps: Video error
Explanation: The BIOS is unable to access the video system in order to write any error messages to the screen.
Diagnosis: This is usually caused by a problem with the video card, or the memory on the video card. It can also be a motherboard issue.
Continuous Beeping: Memory or video problem
Explanation: The system is producing constant beeping in no specific pattern, or a fast "ringing" sound.
Diagnosis: This is usually caused by a problem with the system memory, or possibly the video card. The memory is more likely--the system complains long and loud if it can't find any usable memory, as there is no way to even start the boot process when this is the case. The motherboard itself could also be the problem.
Other Beep Codes
Explanation: You have encountered an Award BIOS beep code I do not have documented.
Diagnosis: Award says that any beep patterns other than "one long followed by two short" are likely problems with the system memory. However, of late they have started adding other beep codes to their systems as well.
Ami Bios codes :
1 Beep: DRAM refresh failure
Explanation: The system is having a problem accessing the system memory to refresh it. Refreshing is done on all system memory to keep its contents active.
Diagnosis: This code usually means a problem either with the system memory or with the motherboard itself.
2 Beeps: Parity circuit failure
Explanation: The parity circuit is responsible for generating and checking the parity bit on the system memory when parity checking is used. This circuitry is not working properly.
Diagnosis: This code usually means a problem with either the system memory or the motherboard.
3 Beeps: Base 64K RAM failure
Explanation: There is a failure of some sort within the first 64 KB of system memory.
Diagnosis: The first bank of memory probably has a bad memory chip in it somewhere. It is possible that there is a failure related to the motherboard or a system device as well.
4 Beeps: System timer failure
Explanation: There is a problem with one or more of the timers used by the system to control functions on the motherboard.
Diagnosis: This is usually a motherboard failure.
5 Beeps: Processor failure
Explanation: The system processor is generating an error condition indicating a problem with it.
Diagnosis: There is a problem related to the processor or motherboard. Note that this doesn't mean that the processor is necessarily dead; with a dead processor the system won't boot at all (it runs the BIOS code that is used to start up the PC.)
6 Beeps: Keyboard controller / gate A20 failure
Explanation: The keyboard controller is a chip on the motherboard that communicates with your keyboard. It also controls the A20 gate that provides access to the high memory area (HMA). This component is indicating a failure.
Diagnosis: This is usually a problem with either the keyboard or the motherboard.
7 Beeps: Virtual mode exception error
Explanation: Virtual mode is one of the different modes that the processor can run in. The system is reporting an error when testing this mode.
Diagnosis: There is a problem related to the processor or motherboard. Note that this doesn't mean that the processor is necessarily dead, since the system won't boot at all with a dead processor.
8 Beeps: Display memory read/write failure
Explanation: The BIOS is unable to write to the frame buffer memory on the video card.
Diagnosis: This is usually caused by a problem with the video card, or the memory on the video card. It can also be a motherboard issue.
Note: Unlike the other AMI beep codes, this one is "non-fatal". The system may continue to boot despite this error.
9 Beeps: ROM BIOS checksum failure
Explanation: The read-only memory (ROM) containing the BIOS program (which is what is running when you turn on the PC and what generates this error) uses a checksum value as a double-check that the ROM code is correct. This checksum is compared against the values in the ROM each time the PC is booted and if there is a mismatch, this code is generated.
Note: This error is not the same as a CMOS Checksum Error, which refers to corrupted values of the CMOS settings, the ones you set through the BIOS setup program. This error means the contents of the BIOS code itself are damaged.
Diagnosis: The BIOS ROM chip on the motherboard is probably faulty. It could also be another component on the motherboard.
Recommendation: Troubleshoot the motherboard. It is possible to replace just the BIOS ROM chip but often replacing the motherboard will make more sense for cost and simplicity reasons.
10 Beeps: CMOS shutdown register read/write error
Explanation: A component of the motherboard is producing an error interacting with the CMOS memory that holds the BIOS settings.
Diagnosis: There is likely a problem with the motherboard.
11 Beeps: Cache memory error
Explanation: The system has attempted to verify the operation of the secondary (level 2) cache and has encountered an error.
Diagnosis: This usually means a problem with the system cache. It may also be a more general problem with the motherboard.
Continuous Beeping: Memory or video problem
Explanation: The system is producing constant beeping in no specific pattern, or a fast "ringing" sound.
Diagnosis: This is usually caused by a problem with the system memory, or possibly the video card. The memory is more likely--the system complains long and loud if it can't find any usable memory, as there is no way to even start the boot process when this is the case. The motherboard itself could also be the problem.
Other Beep Codes
Explanation: You have encountered an AMI BIOS beep code I do not have documented.
Diagnosis: Your BIOS either defines beep codes that are different than the standard AMI BIOS codes, or I have an omission in my list.
Recommendation:
Contact the vendor of the system or motherboard. They often have more specific information on beep codes.
Troubleshoot as an apparent motherboard problem (best chances of resolving an unknown problem).