Thread: Monitor doesn't occupation

When I start my computer, screen won't show something. The green light beside monitor power button blinks every seconds. I am pretty in no doubt that all else is effective besides monitor. Please help me to solve this problem.

Attempt monitor on a different computer or if have a new monitor try it pace of one giving problem.

So do they have to buy something for computer or do they have to do few things, and does dirty computer, and I mean like piles and piles of dust have something to do with difficulty.