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cmos checksum error-asus A8V

wmsunder
wmsunder asked
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Last Modified: 2008-02-01
Okay, I need a quick response to this one if possible, if anyone has any ideas.

I have an Asus A8V motherboard that displays a cmos checksum error. The system will not go to post and I cannot access the BIOS.

This presents an interesting set of problems. I think I need to flash the BIOS but I cannot get access to it. I have tried the following:

I have unplugged all devices from the mb except for one stick of ram and the proc.
I have removed the cmos battery and tested it with a vom. It tests out at 3.06vdc.
I have unplugged the power supply and removed the battery for over an hour, completed the CMOS reset procedure and reinserted the battery, plugged the power supply back in.

Still, I cannot get the system to post or even to get to a point where I can start into DOS so that I can flash the bios. I really need to restore this system to full functionality in about 12 hours.

Does anyone have any ideas on this one? I would really appreciate it. Question worth max points and more points possible for quick, complete and detailed solution.

Thanks,

wmsunder
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Commented:
have you changed the psu or anything else since it was last working?

Author

Commented:
yes because I think that the psu got fried in a power surge
Top Expert 2006

Commented:
it could have possibly fried some of your components as well. are you getting any beeps?
testing your components would be important because you have to work with known-good
if you could test your cpu and ram in another system to verify they work, it would help
check the capacitors on the board (example photos) www.badcaps.net..if they're bad, the board's fried
Top Expert 2006

Commented:

Author

Commented:
I need to provide additional clarification. Sorry to have left this off earlier in my hurry to get this resolved.

The computer was working fine, then after customer came back from road trip, computer was off and would not start. First thing I did was replace power supply. That did not work, so I removed all other components from the board, no go either. I then replaced the mb and proc...plugged everything in including the old power supply because I put it on a tester and it came back fine. Figured I would try to return the new power supply.

At this point I get solid red ide light, I check polarity and it's fine. Still no boot. Fans all come on but no beeps and no boot.

Just for kicks, and as part of further testing, I replace power supply with new unit. Test vid card..tests fine. Test lan card, it tests fine, test sound card, it tests fine and so does the HDD.

Now I follow the CMOS clear procedure according to the mb documentation and I finally get words on the screen and two quick beeps on start up. Still no post and no ability to access the bios. If I could access the bios, I would be able to flash because there is an update available. I have a feeling that this mb and proc combination was doomed to fail from the beginning  because, as I understand the bios update is so that the mb will work with "newer" processors. The Processor is an AMD Athlon 64 3200+.

Thanks for allowing me to clarify this case a bit. Please let me know if you have any thoughts of if I can provide further clarification.

Thanks,

wmsunder

Commented:
do you get the vid card readout, what are the words on the screen?
CERTIFIED EXPERT
Distinguished Expert 2019

Commented:
can you try with an "older processor" like it had before?
Top Expert 2006

Commented:
are you sure the ram is good, as well?
I agree with nobus...try an older cpu...you won't be able to post in order to flash the bios until you use the a cpu that meets the bios' current compatability.

Author

Commented:
The solution to this was no solution. Purchased an abit mb, plugged in proc memory and all cards and it worked fine.

Author

Commented:
Modorator, please close this question. No points awarded.

thank you

wmsunder.
CERTIFIED EXPERT

Commented:
No comment has been added to this question in more than 21 days, so it is now classified as abandoned.

I will leave the following recommendation for this question in the Cleanup topic area:
    PAQ - no points refunded

Any objections should be posted here in the next 4 days. After that time, the question will be closed.

compfixer101
EE Cleanup Volunteer
Commented:
This one is on us!
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