Monitor display suddenly turns off, can't get the display back

Windidugo said:

Also I took out the RAM stick, plug back in and turn on, then when i turn it on with no RAM, the motherboard beeps continuously.

That's normal, no RAM gets you a BIOS error beep code as part of the POST. Power On Self Test. A single Beep means everything is OK. On a desktop PC anyway. My laptop doesn't Beep unless there is an error. My desktop PC gives the one beep every time I boot it up.

I think you've had either a GPU or CPU failure, maybe an overheat. Diagnosing and proving it is very hard. No BIOS on screen means its not finishing the POST. It's a hardware issue. It could even be a motherboard fault. No BIOS error Beep code doesn't help. My guess is its failing very early in the POST. Wish I could be more help. If it's the onboard graphics that have failed you may be able to put in a dedicated card and get it working again. No guaranties though. If you can borrow a compatible graphics card for your system it may be worth trying it. Otherwise, your likely looking at taking the PC somewhere to be repaired.

are you sure ?

Where are you getting that figure from ?

Post a snip.

You need at least 4 GB with Windows 7 and I recommend at least 8.

2 GB is not enough at all.

Return the defective memory.

Good tinkering. Get some new new RAM and you should be back in business.

What does the CPU have to do with how much RAM you have and use? I run 8 gig in my laptop and desktop PC.