I just had a problem with my recently bought used computer – Athlon, onboard video, MicronPC.
I was using the new DSL connection and the screen went blank and the computer started beeping. I turned the monitor off and on and got the Please Check Signal Cable message (note: blank occurs on normal shutdown). I shut down and restarted and still nothing on the monitor, the beeping the same as before. About 2 seconds off, then beep, and repeat.
What can I do?