hi all, a few days ago when i turn on my pc there is no display is coming, but after few second i can here that sound while desktop is appear. that means my pc is booting properly but display is not coming. i cleaned and spewed ram slot changed power(6 pin) of my gpu. then i booted up and it worked fine .. but today again the same problem appeared !! so my question is what could be the problem? is my gpu is dying ? or bios problem? (bios is up-to-date though).