HELP !!! PSU or Video Card....

Ok, this after noon, shut my pc down to take the side panal off (installing a fan on the side panal) few hours later I went to turn it back on to look up some info and the system starts being an ***.....Powers up for a second, shuts off, powers up shuts off, powers up, shuts off well you get the point.....

So right away I figure its my power supply....So I hurried my **** up and ordered a new one from newegg before their 12 noon cut off time so Id have it tomorrow.

Well after I god done ordering the PSU I figured see if my power switch is sticking, nope....I unpluged all 5 of my hard drives...tried starting it up..nope...same thing

Then I unplugged my 8800GTX and turned the system on....This time I got it to power up without seeming like it was short on power but I got the no video card installed beeps and the system shut itself off a few seconds later...

So I am assuming that my PSU blew a nut recently. The thing that I dont get is why does the systems keep trying to boot up..Usually when a system shuts off from lack of power the system stays off it dont try and turn itself back on like its doing to me...mine will run a sec, shut down, turn itself back on....it will do this as long as you let it.

I am using an Asus P5B Deluxe Wi-Fi edition....maybe its somthing unique to this board IDK

Anyone got any other idea instead of a blown PSU wich is my estimate.....

Seeing as it was working fine before you opened it up to fit a new fan, it is a possibility that you may have unwittingly nudged something loose. If I were you I would remove and re-seat things like the ram, all cards, all connectors, and maybe even the processor to see if there is any improvement. If that makes no difference, try resetting your cmos, your mobo manual will tell you how to do that.

What make and wattage is your PSU and how many amps does it have on the 12 vault rail?

Hi Jim,

1. It sounds like something may be short-circuiting. maybe a screw fell behind the motherboard when you opened it? make sure that nothing metal fell anywhere that could be shorting something out.

2. if that doesn't fix it, since you already ordered a new PSU, you may as well try that next.

3. if that doesn't fix it, then try rik's suggestion of resetting CMOS.

4. if that doesn't fix it, then I would suggest you remove everything from the case, clean it, and "table test" it 1 component at a time until you find the "problem component". removing everything from the case would also verify if a short circuit (grounding the mobo) was to blame

cheers :wave: