unlikely. Does it just go blank, or does it go into power save (i.e power light changes colour and/or flashes)?
it goes blank, aka black, and i already checked the monitor cable, its fine, maybe a short circuit or something
Have you checked the pins inside the piece at the end of the monitor cable? If those are damaged, it will give you some problems.
We had this same problem with my dads pc and moniter. We swapped moniters and now it has no troubles at all. It could be compatibility issue. That was the basic problem for us. :-\ What type/brand is the computer