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Computer Wont Start!

Okay so i'll start with the specs on my computer as of what is CURRENTLY IN THE PC-
CPU- Dual COre proccesor (not sure on exact specs) Socket T (LGA775)

GPU- Nvidia 8500 GT
MOBO- FoxConn G33M02
RAM-DDR2 4x1gigabyte sticks (Total of 4 gigs of RAM)
PSU-Rocketfish 500W 80 plus certified (Newly installed but was working for past 2 days)

Okay now my problem! For the sake of figuring this out I am going to go in great detail of events that have ocurred leading up to this.

I installed the Radeon R7 260X last night, after getting drivers installed and all it worked awesome for about 2 hours. After which my computer started blacking out and id have to restart after about each hour of use. It was NOT turning off by itself, the screen was just going black. So i decided i would just go to bed and this morning I would change out the GPU back to my Nvidia 8500 GT. I went to turn on my computer for one last attempt at my Radeon R7 260X, and this is what happened: My PC would not turn on. It did however when I hit the power button flick the LED on my PSU on, and flicks all the fans on for a split second. I mean like basically just on and then immediately off. After I hit the power button the first time and it does the flicker nothing happens if i keep hitting the button.
THINGS I HAVE CHECKED- Making sure CPU power plug was plugged in properly.
Tried unplugging everything and waiting 10 seconds, then pluggin in only the power cable. (Same thing happened).
Tried pressing power button (it flickered), and then waiting 30 seconds and hitting it again.

I have another PSU i can change to IF NEED BE.
6 answers Last reply Best Answer
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  1. Best answer
    That PSU sounds...uhm...fishy.

    I suggest plugging the other PSU to the mobo and other peripherals, without actually installing it.
  2. Do you think I should try changing out the PSU, im only hesitant because last time my computer broke down I started changing parts to quickly and it just caused more problems. IF its not the PSU then I could end up dmging something while changing them out.
  3. okay I do that just by sitting the PSU outside the case and just plugging in all the cords?
  4. Yeap, just make sure you don't cover the fan intake, place it on its side, so it can breathe.
  5. You sir, Are awesome. Thank you so much! plugged it all in and BLAMO! Turned right on. YOu dont think faulty RAM could have caused it though do you ? Cuz i took out 2 sticks that way i could easily plug in the MOBO cable and i forgot to put it back in before i ran the PSU.
  6. JaysonMesecar said:
    You sir, Are awesome. Thank you so much! plugged it all in and BLAMO! Turned right on. YOu dont think faulty RAM could have caused it though do you ? Cuz i took out 2 sticks that way i could easily plug in the MOBO cable and i forgot to put it back in before i ran the PSU.


    It could be, try it out. Either way I'm glad I helped somehow! xD
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