front power switch never worked - PM800-M2

September 29, 2011 at 11:11:56
Specs: Windows XP PRO SP3 32-bit
We have one PC with a PM800-M2 motherboard on which the front panel power button is a no-op. It will neither start nor stop the system. System boots fine when PSU rocker switch is moved to 0 and back to 1. PSU voltages are nominal according to the power monitor built in to the BIOS. System seems to operate fine otherwise.

I have ruled out the front panel. The button will reset the motherboard if connected to the reset jumpers. the reset button, which is also good, will not power up the system if connected to the power up jumpers.

The BIOS offers no option to ignore the power switch. Closest option is to change its action when system is running from instant-off to 4-seconds-off. It's set for instant-off. Button does nothing even if held for 4 seconds.

Anything else I should try before I write it off as a broken motherboard or PSU?

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September 29, 2011 at 15:01:25
I also had a PC with a broken power button, but the reset button worked fine powering up the PC when connected to the power up jumpers.
Try putting your motherboard in a different PC case and see if the front panel works.

E8500 | 4GB | 320GB | 9800 GT 1GB @ 720/990 | HP w1907 @ 1440 x 900 60Hz| Win7 Ultimate SP1 x64

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