I got a new case and a new graphics card. I put all the components from my old case into new one (the old graphics card as well) and tried it out. It worked, so I removed my old graphics card's driver using DDU. I took out the old graphics card and put the new one in and now the monitor says "no signal". I tried with my old GPU and it still says no signal. I can't get into BIOS, i don't get any signal. Apart from that evrerything seems to work fine, FANs spinning, lights are up etc. So What could be the problem? What should I do? Thanks for the answers in advance!