Monitor blacks out upon startup.

My monitor keeps blacking out upon startup. I can push the monitor's on/off button and whatever I'm on (desktop/web page) will flash briefly- enough to let me move my cursor a bit. Eventually it works normally but getting online is very frustrating when you can't see what you're doing. The blacking out periods seem to be getting longer also.

• › [Solved] Computer monitor trouble shooting!
• › 2 inch wide black bar on right side of my HP compac laptop
• › boot up problems at startup
• › [Solved] Monitor says No signal while Loading FarmVille on Facebook
• › [Solved] Toshiba laptop has black screen.
• › [Solved] repair old pc,re-loads Input signal out of range ?
• › everying is running but my monitor shows nothing