When I power on, my monitor reads: No signal coming from computer. Then the monitor enters Power save mode. The computer is non-responsive and it also beeps every 5 seconds.
This is probably due to bad RAM. If you have more than one, then remove them all other than one and try to turn it on. If this fails, swap the stick one at a time until it turns on without the beeping.
I would also suggest you take out the battery on the board, leave it out for 2 minutes, then replace it and try again.
I would also look through these beep codes. I can't copy the content to SuperUser as I don't know what BIOS you have.