When I shutdown my laptop and turn on immediately its boot screen and windows screen dont show up for 2-4 hours..
But if I hibernate my laptop and turn on immediately its boot screen dont show up but after loading windows 7 or windows 8 its screen turned back on..
due to this reason i turn my laptop on after 4 or 5 hours, and both boot and windows screen showed up..
what is the problem with laptop?
I Installed different windows many times and also installed many bios versions.. and i also tried external monitor, and laptop properly runs on external monitor. I also changed my laptop screen but same problem occured.