pc shutting down

[timbo2272]

hi all, i am new to this forum and need some help from someone, my pc is an asus a7v8x-mx, 1.25 gigs pc3200 memory, amd athon 2500 (barton core) was running at 166 fsb (333 as athon double fsb). suddenly pc shut down now i can only run it at 100 fsb (200). one of the problems is the -12 v only shows as 0.8v. could this be a psu or is my mb shot. any help would be appreciated

[Darthtanion]

Re: pc shutting down

The first thing to try is to restore the factory default settings on the mainboard. This should force an auto-detect of the processor and you can go from there. If that doesn't take care of the problems, then we can start troubleshooting other areas.

[Yawgm0th]

Re: pc shutting down

Also, list your power supply and video card. Can't be pointing to possible hardware problems if we don't know what the hardware is.

[timbo2272]

Re: pc shutting down

hi, thanks for replies so far.
psu is 350 watt from fsp group inc (forton/source)
video card is a radeon 9250 agp 8x 128mb, pc will only run at 100fsb instead of 166 fsb.
voltages are
cpu core 1.71v,
cpu aux 0.02v,
+3.3v = 3.30v,
+5v = 4.81v,
+12 = 11.31v,
-12 = 0.80v
+5 v standby = 4.97v
vbat battery = 3.18v
these voltage as record by aida32 software.
from the above i don't think some of the reading are good, but then how is my pc running in windows at 100 fsb but will not run at 133 or 166 fsb

[timbo2272]

Re: pc shutting down

hi all. thanks for the replies, bought new 400w psu and fitted it, pc up and running sweet as a nut.

[Yawgm0th]

Re: pc shutting down

11.31v is well out of ATX specifications. That's a bad PSU alright. Mind you, the way the motherboards read voltages isn't very accurate, but it's close enough that I'd declare that a bad PSU without actually getting out a multimeter.