My PC doesnt start after testing some ram sticks

paplo22

Honorable
May 15, 2013
10
0
10,510
My dad was testing som ram memories he got on his job and when he left the pc I tried to turn it on and it didnt start it just resets after a few seconds the Windows 8 start screen appears.
I already unplugged my HDD's,
The only way I can see my files(which I already backed up)is the mini Windows XP that comes with Hirens boot CD
I tried to turn on my pc only using one stick of ram and still the same.
I cant even install a new Windows I tried with XP, 7 , 8.1 and still the same.
Please Help (sorry for the bad english)
 

paplo22

Honorable
May 15, 2013
10
0
10,510

I reset the CMOS by pulling the batery it was on my manual
I dont see where is the jumper on my board
( I have a GA-B75M-HD3)