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ASUS Support Home Location : Forum > Motherboard > M3A  
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  Topic : [Problem]Post Codes New Topic
Tidd
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Posted:4/15/2008 1:58:00 AM # 1
I am trying to troubleshoot an issue with my M3A 770 Montherboard and to do so I need to know what the post codes are trying to tell me. I have looked in my manual and do not see a listing of them. Does anyone know what they are?

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Ulrich
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Posted:4/15/2008 2:32:00 AM # 2

Beeps

Error Message

Description

1 short DRAM refresh failure The programmable interrupt timer or programmable interrupt controller has probably failed
2 short Memory parity error A memory parity error has occurred in the first 64K of RAM.  The RAM IC is probably bad
3 short Base 64K memory failure A memory failure has occurred in the first 64K of RAM.  The RAM IC is probably bad
4 short System timer failure The system clock/timer IC has failed or there is a memory error in the first bank of memory
5 short Processor error The system CPU has failed
6 short Gate A20 failure The keyboard controller IC has failed, which is not allowing Gate A20 to switch the processor to protected mode. Replace the keyboard controller
7 short Virtual mode processor exception error The CPU has generated an exception error because of a fault in the CPU or motherboard circuitry
8 short Display memory read/write error The system video adapter is missing or defective
9 short ROM checksum error The contents of the system BIOS ROM does not match the expected checksum value.  The BIOS ROM is probably defective and should be replaced
10 short CMOS shutdown register read/write error The shutdown for the CMOS has failed
11 short Cache error The L2 cache is faulty
1 long, 2 short Failure in video system An error was encountered in the video BIOS ROM, or a horizontal retrace failure has been encountered
1 long, 3 short Memory test failure A fault has been detected in memory above 64KB
1 long, 8 short Display test failure The video adapter is either missing or defective
2 short POST Failure One of the hardware testa have failed
1 long POST has passed all tests  

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There are 10 kinds of people in the World...Those who understand binary, and those who dont!
Tidd
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Posted:4/15/2008 3:08:00 AM # 3
Thanks for the listing. I will listen for the beeps when I get home. I have a handy tool that show the digital read out of the post codes, auch as code = d2 etc... Does anyone know if there is a listing out there that shows this as well?

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Ulrich
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Posted:4/15/2008 6:15:00 AM # 4
You might find a lisiting here...

http://www.ami.com/support/doc/AMIBIOS8_Checkpoint_and_Beep_Code_List_PUB.pdf

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There are 10 kinds of people in the World...Those who understand binary, and those who dont!
Tidd
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From: United States
Posted:4/15/2008 9:52:00 AM # 5

This is exactly what I was looking for. Thanks for all the help! I am pretty sure that I have a bum board after looking through that manual.

On a cold boot the POST hangs on code d5, if from that point I hot boot it the POST hangs on C0. Neither of these makes much sense at all.

d5 & CO respectively:

Bootblock code is copied from ROM to lower system memory and control is given to it. BIOS now executes out of RAM. Copies compressed boot block code to memory in right segments. Copies BIOS from ROM to RAM for faster access. Performs main BIOS checksum and updates recovery status accordingly.






 

Early CPU Init Start -- Disable Cache – Init Local APIC


Thanks again for the help!

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