no gpu output

[alexandermva15]

i bought a new gpu (msi gtx 750ti) and installed it in my desktop but my monitor didn't detect any signal even if everything was connected and the pc was working, so i decided to put back in my old gpu (gt 520) that worked correctly before. Now none of the gpu's work. The pc is on and all fans are spinning. I have tried to reset bios from the cmos jumpers but even that didn't work...
It would be nice if i can get a output signal even from the old gpu.

i'm using a dvi connection

the pc also turn back on when i try to shut it down from the on/off button.

 

[lonewolf7]

What is your DVI connector ? DVI-D/DVI-I ? Usually DVI-I (24+5) works on GPU. You can try with a HDMI/VGA cable also to get the display.

Do you have onboard display (on the back of MB, VGA/HDMI/DP) if so try to get the display from those ports, if its working then great, if not then there's something else to be worried about.

Try a new CMOS battery, sometimes it can do wonder. Else you can remove the old CMOS battery for 5 mins. then put it back, when doing so don't forget to remove the power cable from PSU, after the work is over you can attach it.

And lastly what is the make/model of your PSU ?

 

[alexandermva15]

i have tried every single gpu output on the old and new gpu but none works (vga hdmi and dvi-i double link). I dont have onboard display outputs....
cmos battery didnt work and i have no idea what my psu is. (it's a prebuild)

http://h20564.www2.hp.com/hpsc/doc/public/display?docId=c02917740

 

[lucas_7_94]

Datasheet says its a 300W psu, but generic. I made some tests with your system here http://outervision.com/power-supply-calculator, and it required 298W. 300W psu (also, generic) is really close, maybe here this is your problem.

 

[alexandermva15]

yeah, but if that was the problem the old gpu should run fine...