'Pho3niXnz'
if it is not a software problen then hardware.Try to jump into the BIOS and set the standard settings,if you are in,there is an option named halt=All but keyboard then set the first boot device to cd dvd ,save settings,the installer must be in the cd drive,reboot,when asked press any key to boot from atapi cd rom
If after that nothing happens or blue screen again then hardware problem (ram(went out),cpu(overclocked),vga(went out,wrong driver installed) or newly installed unit(wrong driver installed or incompatible unit))