Computer turns on but nothing displays

Romppe

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Sep 20, 2014
3
0
4,510
So, yesterday i played game and then my display just went black. So, the graphics card (gtx 750TI OC) is not dead. I tested my another one gpu (GTX 560TI) and with same result which is black screen. Computer itself turns on normally and without problems. My motherboard is looking working(?) There is a green light so i hope that means it working? I would be greatful for help :3!
Sorry for my bad english,
 

Youssif94

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Apr 15, 2014
16
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4,510
sure that the monitor is still working? also check the psu
this happened with me before, i guess the psu was dead or so, it was just giving black screen till i changed, so.. check the psu as well
 

Romppe

Reputable
Sep 20, 2014
3
0
4,510
Thank you Youssif94. But i solved problem which was something doing with RAM. I unplugged all rams and insert only 1 and it works now, but i have another problem now. When i boot up, i get bootmgr is missing. I have no clue why..?