ASUS A8V won't post?

[Gendo Ikari]

An A8V I salvaged finally died. I can't tell once wrong, but I've swapped out the Video Card,power supply, and RAM, all of which are fine.I have also swapped the RAM around, trying all the slots with just one stick of RAM at a time. The CPU also works in my other socket 939 boards as well. The A8V will power up, it just won't POST, or even beep.

Has anyone heard of this before, and know a solution?

[Oerg866]

Re: ASUS A8V won't post?

A8V seem to be failing a lot. There are a lot of them on ebay (as "defective"), might be a relation.

cheers!

[PCBONEZ]

Re: ASUS A8V won't post?

Sounds like bad KZG or OST caps.
They fail without bloating and Asus loves to use them for their planned obsolesence program.

KZG seem to like to 'just quit' suddenly with no indications of pending problems before hand.

A board that age might also have the Nichicon HM/HN issues.
-
https://www.badcaps.net/forum/showthread.php?t=6290
He didn't report back but obviously some A8V had KZG.
.

[bigbeark]

Re: ASUS A8V won't post?

PLEASE replace the BIOS battery and try again.

I actually have had Gigabyte socket 478 refuse to post or beep. Replacing the Bios battery fixed the problem.

Speaking of KZG, I was donating an IBM ThinkCentre desktop to a friend. I opened it up and saw KZG!!! around the heatsink. Replaced everyone with Ruby MBZ. Replaced the ridiculous 2.4Ghz Celeron with a Prescott 2.8Ghz FSB533. The performance improvement was unbelievable, a complete transformation.

[lmcancu]

Re: ASUS A8V won't post?

Lack of beeps may indicate that the CPU is not getting any power. Check for/or replace at a minimum the CAPs around the CPU. Could also be a bad MOSFET which happened to me on a newer Gigabyte board.

[Gendo Ikari]

Re: ASUS A8V won't post?

Yes, I visually inspected the caps, one of the first things I did, and they looked fine. I really like the board, so I may send it in, as soon as I get the cash. It's for one of my file servers, and I've had good luck with my other recaps from here x3

[yyonline]

Re: ASUS A8V won't post?

I built a bunch of PCs with A8V-VM boards way back when. The A8V-VM certainly appears to be related to the A8V. Mine had all Panasonic caps, but your luck may vary as Asus likes to use a myriad of capacitor brands.

Interestingly, I've had 2 out of 5 or so A8V-VM boards with defective BIOS chips. They did all sorts of really odd things...from what I can remember...they ran very slowly, would sometimes fail to post, and one stopped detecting hard drives. I don't have an EEPROM flasher, so I ordered a pre-flashed chip from eBay. After replacing the bios chip, both boards started working again. I don't know that your case would be the same, but to have multiple bios failures from the same board just seems too rare to be a coincidence. It was a socketed bios chip and easy to replace.