Re: PC BOOTS UP MONITOR STAYS BLACK
Gee um ok,
Right Ram comes in pairs, double check yours are paired up as purchased, even to the point of using just 2 rather than all 4. mobo manual (if available will tell you more)
disconnect your PC, remove and reinsert your video card, ensuring it is fully inserted.
if you have the manual, also have a look for a beep code dictionary, (may or may not be any help)
What video card is it?
Does it have a vga or HDMI connection you could try aswell?
VGA Drivers installed?
A reset BIOS default settings shouldn't cause this kind of problem, so run on default settings till solved.
Ensure all your cables, particuarly power are properly connected,
Maybe check your PSU output vs your systems consumption. 750 seems to be enough any peripherals pulling alot of juice?
Disconnect your Cd drive, just to see
Just some ideas