Shuttle FV24 before I give up?

[Macic1734]

I have a Shuttle SV24 with the FV24 motherboard and a Pentium III 1.0b Coppermine CPU. The problem is spontaneous rebooting when cold. I have recapped the board using the Badcaps kit and the testing power supply is a new standard full size ATX unit. The board will post and start to boot the OS (no matter if it's Linux from CD or Win 2K from the HD) and reboot in a loop over and over.

When I interrupt with F8 and let the board warm up for 10 minutes or so it will boot up normally and any OS run all day. Let it cool down and the problem restarts. Could I have another small badcap somewhere? I could just toss it but it's a nice little PC. I have also tried at least a dozen different DIMM's to make sure it isn't a RAM problem. Thanks for any ideas.

Jeff

[kc8adu]

Re: Shuttle FV24 before I give up?

probably a bad cap that is marginal cold but good enough warm.

[Macic1734]

Re: Shuttle FV24 before I give up?

That's what I thought also. Even though the 11 larger caps were badly bulging, the symptoms remain the same after replacing all of them.

The only caps that are left are very small electrolytic and surface mount. Perhaps someone else might have run across this before with another board.

Thank You

[Bookworm]

Re: Shuttle FV24 before I give up?

You could also have one of the caps not having a full load of solder in the hole.

I had to go back on an iDEQ unit and do that, because I realized that a couple of them LOOKED right at first glance, but under the lens they weren't totally filled.

Pull the board, flip it over, and inspect all the solder points with a good strong light and magnifying lens.

[kc8adu]

Re: Shuttle FV24 before I give up?

surface mount lytics are notorious for going bad.
an esr test often is misleading as there are others in parallel elsewhere to give a good reading.
if i suspect them i replace all with smt tantalums.