PC powers on, but 'shuts down' after minutes

Zwal

Honorable
Jun 3, 2013
2
0
10,510
Hi guys,

A nephew of mine installed some stuff on the pc of my folks and it slowed down crazy. I cleaned the HDD to reinstall Windows.
But the pc went crazy and it drives me crazy now, have been trying to get Windows installed, yesterday and today after work, but the pc just keeps going off it seems.
I startup, if i dont do anything i get the message, boot.msg. If i choose BIOS or make the dvd master, everything seems to go well, but after a couple of minutes everything goes blank and the screen says, no video input. But all the fans, including those of my videocard and CPU and case keeps on spinning. But my videocard and CPU cools off, so i guess the mobo shuts all off.

What could be the reason? MOBO fail? videocard gets too hot and some kind of security mechanism? Or is the power supply?

I tried the following: 1) I opened the case, cleaned all the dust, 2) removed 3 ram sticks, 3) I got an old HDD and tried to get it work with that, 4) tried another screen, 5) i removed videocard and tried to clean, 6) i removed the battery and reset BIOS, 7) removed cpu heatsink and reinstalled, all failed.

I wanted to try another videocard, but dont want to buy a new one, and havent been able to find one till now to borrow and check that out.

Please do help me, cause i really want to solve this thing..

Check the 2 photos, the inside of the pc and the videocard.

http://s21.postimg.org/ipd3n75d3/20130603_232747_1.jpg

http://s23.postimg.org/t1f88cm4b/20130603_232657_2.jpg
 

Zwal

Honorable
Jun 3, 2013
2
0
10,510
Hi, all fans are spinning, including those of mine tower

Heatsink etc all attached correctly. i measured the temp before it shut down itself, last temp was 51C.

Ive AMD Phenom II x4 processor and 8GB RAM. I tried it with 2 gb and with all RAMS, same result.