Problem: Fans Stay if System is Off : Shuttle SN25P

Got a problem, trying to see if someone has seen this before
My Shuttle SN25P's Fans and the ATI x850PE fan stay on when system is powered down!

I recently swapped CPUs, with a OC friendly AMD x2 3800.
I did have a problem with a PCIe power adapter, the one I had previously was way too long, bought one at Frys that had a dual Moxel to single PCI-e 6 pin connector with 3-grounds and 3x 12V lines on the PCI-e side. Plugged that into the x850PE and nothing happened. Went back to the old adapter, and everything seemed fine until I shut down.

Did I damage the PSU or MOBO?

Check if your computer is going to sleep instead of shutting down. To me, it sounds like your PC in going to sleep (S1) state. Check the power options in Windows and check the power management options in BIOS. In BIOS, choose sleep mode S3 (STR - Suspend to Ram) is possible.

thanks ... I forgot about the SLEEP states, I'll check that. Although it's hard to believe somehow it's stuck in sleep mode. Could a BIOS re-flash help?
BTW, If I simply plug it in, flick the PSU switch on, all the fans will start before you hit the power button.

I just noticed my 12V readings are way off ... I'm only getting 10.5V
Something got fried ... how is it even running with only 10.5V?

The heat in those boxes quickly kills the caps in the PSU and on the mainboard... verify they are okay, if not you can have the system recapped...

MD_Willington said:

The heat in those boxes quickly kills the caps in the PSU and on the mainboard... verify they are okay, if not you can have the system recapped...

Click to expand...

I'm seeing similar things (flaws) mentioned on the Sudhian forums. Thanks for the input on this. One more thing, the guy posting about this problem is having trouble identifying the specs on the bad caps. Sounds like this could cost me some $$$ since I might be buying a new PSU from Shuttle if I want it fixed sooner than later

i'd strongly recommend flashing bios, then set it up as S3 for the BIOS. As a previous shuttle employee, i believe that should help it. Unless you have a leak in the PSU.

Will do, now I just gotta find a spare floppy drive . DOH!!!