PC Powers on and immediately shuts down

Hi all,

So I power my PC on and it shuts off within half a second. The fans spin, LED's light up. I have to pull the power cable out and wait for the greenlight on the mobo to go out then plug it back in and hit the power button for it to even do all that. I've tried Reseating everything, checked for loose screws on mobo, tried plugging it into different sockets. I recently changed the thermal paste on my processor/heatsink if that gives any indication. i cleaned it off and redid it so i dont think that is the issue. I also have the green light on my mobo indicating there is power, so i dont think its my PSU. :confused Oh and right before it failed i was having issues with my hard drives failing. i have two, one would work then die, then the other one would work and the one i thought was good would cease to work. I want to try all possible solutions before i start replacing things as i cant afford it.

Any input will be much appreciated. thank you.

 

It sounds like the power supply is failing. Would you have another to swap out, or a meter to test the original one? This is where I would check at this point

 

Thanks rwandrew077

sadly i don't but i'm sure i could get a meter. I'll check it out and let you know what i come up with. So you think its the power supply even thought the light on the mobo is on? any reason why it would do that?

 

Oh yes, just because that light is on does not mean it is functioning properly. If it is not outputting the correct power amounts, things will fail. All that you describe sounds like a failing power supply. The first thing I would do is test the PS, if for nothing than to rule it out as a problem.

 

So even if it wont stay powerd for more than a second the tester will tell me whats wrong with it? I will look into getting one if i can find it for cheap. I saw one on bestbuy but thats 40$ i might be better off getting a new PSU

 

yes, a new PS would be about the same...and if it is not staying on long enough to test...well...that would seem to be a PS Problem in itself

And it is an easy enough replacement as well. 4 screws and a few plugs

 

It's actually about time that thing failed on me haha. Thanks a lot for your help i really appreciate it

 

Keep me posted on how it goes

 

Will do

 

Buying a new Power supply today i guess that was the issue. I posted a problem with my hardrives too. Its one thing after another with this beast haha.

 

Good Luck...