Ran CPUBurn. System shut down after 3 min. Now it won't turn on.

[Jeff7]

This is most unusual. My secondary system, T-bird 1GHz@1.4GHz, which I'm testing for stability apparently hit the 63C warning temp I set in BIOS, and shut down. The board is a Soltek 75-KAV; heatsink is an AX-7 with an 80mm fan, and ASIII. It just shut down. Ok, needs better cooling maybe, or different limits. Now it will not turn on at all. Tried clearing BIOS, disconnecting power, etc. Anyone else ever experience anything close to this? Nothing popped out of place, nothing smells like smoke...what gives?

 

[imported_zenwhen]

You may want to take a look under that HSF... sounds like a slight possibility you fried your processor. Pull the CMOS battery for a few minutes. Try another processsor.

Good luck.

 

[Jeff7]

Well, think I found the problem already. Seems I managed to blow out the power supply. Its internal fuse looks fine, but it just won't put out anything. I'll have to do an inspection of it I guess. Maybe it couldn't handle the high power drain? It is a 300W PSU.

 

[Soccerman]

heh.. maybe the software did it's job. check to see if there's any smoke!

btw, try letting it sit for a while before turning it on.

doh! posted to late.. bah!

 

[Jeff7]

Think I found the problem. A section of the board with 2 small resistors and 2 diodes - the top of the PCB looks brownish, and the bottom is showing signs of internal charring in that area. At one place, it almost looks like the solder melted between two joints and caused a short; not sure about that though. Either way, there's definitely some overheating here.
Brand of the PSU is:
L&C Technology Inc.
Model: LC-300ATX

 

[WarCon]

Sounds like it was a marginal supply to begin with. CPUBurn probably pushed your 5v rail farther than it could take by achieving full load. It would of probably happened later anyway though.

Out of CPUBurn 2's readme file.

*** WARNING ***
These program is designed to heavily load CPU chips.
Undercooled, overclocked or otherwise weak systems may fail causing data
loss (filesystem corruption) and possibly permanent damage to electronic
components. Nor will it catch all flaws.
*** USE AT YOUR OWN RISK ***

 

[Jeff7]

Yeah; CPUBurn sure does a good job of what it does. Of course, any part up to spec should easily tolerate CPUBurn.

 

[WarCon]

Sure finds the ones that aren't though........

 

[Jeff7]

Ok, got the thing a 400W PSU. Let's see how this one does.