I have a samsung syncmaster 933SN monitor. It keeps blinking on and off. I have rebooted. Unplugged and replugged all connects from pc to monitor and it keeps bliking on and off.

If you heard a 1 beep that means your computer is working! But with 1 long beep and 3 short beeps or 1 long and 8 shorts beeps and no beep. That means there is a problem with you computer. Try cleaning your video card and memory pin using hard eraser and brush it using small paint brush. If still doesn't work try connecting your computer with different monitor. If still doesn't work, probably either your video card or system ram(memory) have the trouble. In that case you need to troubleshoot your computer component by testing 1 by 1 with working parts in order to identify the defective parts. Good Day