Hybrid Sleep + dead PSU
The current situation is that a client has a PC that is dead, won't power on. Here's the list of events leading up to this. System was home built several months back and running fine with sleep hybrid enabled.
1. Then one day I get the call that it's dead. So I opened it up, pulled the 20 pin power connector and 4 pin CPU power plugs off. Jumped the PSU PON pin and after a minute or two it powered on. Put it all back and everything was fine until...
2. Same thing happened again immediately when it went into hybrid sleep. So I did the same thing, got it back running. Then I looked into the BIOS and noticed 'wake on S3, S4, S5" was disabled. So I enabled that and everything was fine once again and I tested hybrid sleep several times. Seemed like that fixed it. Several weeks passed then:
3. Now brings me to today. System dead again. Same symptoms. The last thing they did was to put it (via timer) into hybrid sleep using win7. I tried to jumper the PSU and this time it is still dead. I also noticed that the PSU was quite warm even though it hadn't been powered up in a couple of days. Thought that was odd. I checked the CMOS battery and it shows 3.07V. The PSU is well over powered for the system 500W and although not a new model, it has less than 6 months of PON hours on it.
My only conclusion at this time is that the PSU is fried, but I don't want to believe that yet. Or if so, could that hybrid sleep mode have fried it? If so, I'd like to prevent this from happening again. Ideas please?
use sleep or normal hibernation
|reply to bbear2 |
what kind of psu is it, if it's a generic psu that maybe came with a cheap case then it's most likely crap and not anywhere near a 500watt unit.
If it's not broke............Overclock it!
|reply to bbear2 |
If you have jumpered the PSU and it won't turn on, why would you not want to believe it's the PSU? It's probably the quickest and easiest thing to stick a different one in there to troubleshoot this problem (and is most likely the cause).
After 10 more minutes the PSU came back and before that I noticed the power light on the MB was lit - which I didn't notice before. And, since it was a basically an unused PSU, Ultra brand, wasn't cheap - and I have used them before without issue, I found it strange.
I did switch out the PSU and so far so good. Upon opening up the Ultra, I noticed that there were several slightly blown or leaked caps. Not sure if I'm going to recap it or not.
This certainly was a strange one. I've never seen a PSU go partially bad, then recover and be completely usable again (at least for a while).