OK, I posted an earlier message about this problem I'm having under same title but perhaps it's rather confusing so I'm trying again.
I was checking the inside of monitor when I accidentally shorted its power connection. BRRZT! and the electricity went dead. When I turned the fuse box back on, I couldn't turn on my computer, though the light on the stabilizer was on. FYI, the monitor's power cable plugs into the computer PS and during the accident the computer was not on (though the onboard LED was on). I suspected the fuse inside the PS was broken so I decided to pulled the PS out of the case. Turned out everything was OK and it was the fuse of the stabilizer that was broken.
After I fixed everything back and turned on my computer, I noticed the voltages&temp were higher than usual and by looking at the temp&voltages graphics, they looked somehow rather less stable than usual. (Meaning, Vcore seemed to fluctuate more, while usually it hardly changed at all.) The computer felt sluggish so I ran diagnostics and found the memory performance slowed down noticeably and occasionally the MB temp went up significantly (see earlier post).
A few days later after rebooting, testing, etc., it looked like the stability problems had disappeared. After fresh reboot/restart, the voltages&temp now looks normal. For a couple sessions after reboot/restart, voltage stability and memory performance was getting better though still slower than usual. At the time of writing, I can say now memory performance is on the same level as before the accident. I ran test using Prime95 for 2hrs and no errors. I ran memory test using memtest for more than 5hrs (std and ext tests) and also no errors.
So now, the reason I post the message again is because I got the problems again (only) after I decided to run DXDIAG. (I don't remember exactly, but I think during the earlier testing right after the accident, I still had the voltage stability problem even before starting dxdiag. But now that those problems seem to have disappeared after reboot/restart, it is really STRANGE that running dxdiag causes the problems to reappear.) After starting DXDIAG, the voltages all go up (including VCore). Yet, while there is barely any change in CPU temp (1C), MB temp will increase by 20C (using fan directly to SouthBridge area drops it by 10C so net increase is 10C). I checked TaskManager and the computer was mostly idle. Running Everest benchmark again showed decreased memory performance and the computer became sluggish.
Again this is the voltage data and temp (yes, normal temps are high because room temp is around 30C here):
Normal: Increased voltages:
+12V : 12.288-12.335V to 12.608-12.775V
+5V : 4.73V to 4.784V
+3.3V: 3.168V to 3.216V
Vcore: 1.648V (nominal 1.650V) to 1.68V
CPU : 50C to no change (as of now)
MB : 31C to 52C (or 43C with fan)
So here are the questions for you all:
1. Is it possible to damage the PS or MB during the accidental short circuit? Perhaps power flows back (though only the monitor was on, computer was in soft-off)? As you may already know, the PS just put the monitor power receptor in parallel with the AC-line for the computer.
2. Since my problem only appears after running DXDIAG, does this indicate damage on the video card (since Prime95 and memtest show no error)? Any utility to test video card? (But I'm writing this message using still the same computer and the same monitor!)
3. Anyone ever experiencing similar strange problem?
I was checking the inside of monitor when I accidentally shorted its power connection. BRRZT! and the electricity went dead. When I turned the fuse box back on, I couldn't turn on my computer, though the light on the stabilizer was on. FYI, the monitor's power cable plugs into the computer PS and during the accident the computer was not on (though the onboard LED was on). I suspected the fuse inside the PS was broken so I decided to pulled the PS out of the case. Turned out everything was OK and it was the fuse of the stabilizer that was broken.
After I fixed everything back and turned on my computer, I noticed the voltages&temp were higher than usual and by looking at the temp&voltages graphics, they looked somehow rather less stable than usual. (Meaning, Vcore seemed to fluctuate more, while usually it hardly changed at all.) The computer felt sluggish so I ran diagnostics and found the memory performance slowed down noticeably and occasionally the MB temp went up significantly (see earlier post).
A few days later after rebooting, testing, etc., it looked like the stability problems had disappeared. After fresh reboot/restart, the voltages&temp now looks normal. For a couple sessions after reboot/restart, voltage stability and memory performance was getting better though still slower than usual. At the time of writing, I can say now memory performance is on the same level as before the accident. I ran test using Prime95 for 2hrs and no errors. I ran memory test using memtest for more than 5hrs (std and ext tests) and also no errors.
So now, the reason I post the message again is because I got the problems again (only) after I decided to run DXDIAG. (I don't remember exactly, but I think during the earlier testing right after the accident, I still had the voltage stability problem even before starting dxdiag. But now that those problems seem to have disappeared after reboot/restart, it is really STRANGE that running dxdiag causes the problems to reappear.) After starting DXDIAG, the voltages all go up (including VCore). Yet, while there is barely any change in CPU temp (1C), MB temp will increase by 20C (using fan directly to SouthBridge area drops it by 10C so net increase is 10C). I checked TaskManager and the computer was mostly idle. Running Everest benchmark again showed decreased memory performance and the computer became sluggish.
Again this is the voltage data and temp (yes, normal temps are high because room temp is around 30C here):
Normal: Increased voltages:
+12V : 12.288-12.335V to 12.608-12.775V
+5V : 4.73V to 4.784V
+3.3V: 3.168V to 3.216V
Vcore: 1.648V (nominal 1.650V) to 1.68V
CPU : 50C to no change (as of now)
MB : 31C to 52C (or 43C with fan)
So here are the questions for you all:
1. Is it possible to damage the PS or MB during the accidental short circuit? Perhaps power flows back (though only the monitor was on, computer was in soft-off)? As you may already know, the PS just put the monitor power receptor in parallel with the AC-line for the computer.
2. Since my problem only appears after running DXDIAG, does this indicate damage on the video card (since Prime95 and memtest show no error)? Any utility to test video card? (But I'm writing this message using still the same computer and the same monitor!)
3. Anyone ever experiencing similar strange problem?
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