Computer won't power on... [UPDATE 2]

[lytalbayre]

So I have a well established working pc that has run flawlessly for at least 1 year no problems.

The other day, it just quit powering on. No smoke or any indication there was a problem that damaged some of the components thus preventing the PC from turning on.

I'm guessing the power supply died, or the power switch button is broken somehow... When I push the power on button there is absolutely no response. Dead as a doornail.

Anyone have any ideas why this would occur before I go and shell out $$ for a new power supply or computer case?

All cables are checked and plugged in, the power switch on the supply is on.

PSU is about 5-6 years old minimum. 600W Seasonic. Could've just died I guess.

Not overly dusty inside case.

Thanks all.

[UPDATE]

bypassing the switch on the MB didn't produce a result.

Shorting the green and black wire on power connect did turn on the PSU. All the drives and fans not connected through the MOB turned on.

Does this mean the MB is toast? Or what. I double checked all the connectors on the MB and they seem to be solid. Nothing out of place.

HELP ME.

 

[jackschmittusa]

Disconnect the 24 pin power connector from the mb an use a piece of wire (even a paperclip will work) to short the green wire to any black wire on the connector. The psu should start.

You can also bypass the switch by pulling its connector off the mb and shorting the same 2 pins with a pocket screwdriver.

 

[bloodugly]

Originally posted by: jackschmittusa
Disconnect the 24 pin power connector from the mb an use a piece of wire (even a paperclip will work) to short the green wire to any black wire on the connector. The psu should start.

You can also bypass the switch by pulling its connector off the mb and shorting the same 2 pins with a pocket screwdriver.

Definitely the first place to start. Also, have you tried switching the PSU's own switch on the back off for 15-60 seconds? I once had a PSU that was kind of a pain and after I powered my PC down it wouldn't turn back on unless I turned the PSU's switch off for a little while. Did this on any board I hooked it to, and I don't miss it one bit Just an idea. After that I'd try hooking the PSU to a different board or a different PSU to your current board.

 

[lytalbayre]

Bump for more replies after update.

 

[mpilchfamily]

Sounds like a dead PSU. 5 years is about the limit for a well used PSU. So it no surprise its failed. considering the brand its very unlikly that the PSu damaged anything. But look at all the capacitors on the motherboard and make sure none of them are buldging on the top or bottom.

 

[M0RPH]

Do you have a 2nd computer? If you do, then swap the power supplies. That'll tell you for sure whther it's the psu or motherboard. From your testing it does sound like a bad motherboard though.

 

[lytalbayre]

I'm about to pull the trigger on a new Motherboard.

As a last minute precaution, just want to double check with you guys that I can avoid purchasing a PSU since was able to start the PSU by shorting the green wire to black.

Please confirm MB only should fix my problems.

Thanks guys!!!