I have philips 107T 17 in flat monitor for 3 years but now it's statrting to have problems. The image switches to hourglass shape sometime, and I have to smack the monitor on the side (sometimes very hard) to get it back to normal. If I turn it off for like hour it's normal. When I play games for long time it goes to hourglass shape.I can't send it to the repair for manufacturer because I lost my sales receipt. Don't know what's going on, is it time to buy another monitor?
You might look into a local tv repair shop, but it sounds like its gettin' ready to give up the ghost.
I wouldn't spend more than $100 to get it fixed. You can buy nice used ones for that.