graphics card Graphics card problems.

[Random pc noob12]

Hi!

I have some trouble with my hp pavilion. One day I got a stupid idea to disassemble my Pc. Well that's fine I got it into pieces and back. But after that when I tried to boot it, I didn't get any input to my monitor so I tested another graphics card. I had a different graphics (No PCLe cables) card laying around luckily and that worked. I thought I found the problem cause it worked perfectly with that another card so I bought new graphics card.(that did not work). So now we are here. I would expect now that there is problem with my power supply but I wouldt like to spend money and realise again that It doesn't work. Does anybody have anyideas to fix this or other things that might cause this? 

Thanks

[Mumintroll]

Ask a friend if you can borrow his pc to troubleshoot your parts with.

Test the gpus and the powersupply in his pc.

[Random pc noob12]

Only if I had someone