Monitor flicker problems

[Dreadson]

I just purchased a new monitor. It seemed to work fine at first (or I didn't notice the problem at first), but now the screen's brightness is flickering between bright and normal, and the picture grows and shrinks a little bit randomly. Also there are barely noticeable, thin lines about an inch apart starting at the bottom and going up the screen (they're at a slight angle). I tried pressing the degauss button to try to fix the problem. I have powered down and up several times. I have moved my speakers and any magnetic influence away from the monitor. I changed the refresh rates and tried every possible resolution and rate. The problem wasn't present the first day I got the montior. It seems to be getting worse. It's a Cornerstone Color 50/101sf with a Nvidia GeForce FX 5200 powering it.

 

[pmonett]

The best refresh rate is around the 75Hz level. Most recent CRTs should be able to use that rate at the most common resolutions (assuming you are using a CRT).
In any case, if you are not touching the controls, there is no reason for a monitor to change brightness.
I would bring the monitor back and have it replaced.

Pascal.

 

[Dreadson]

Thank you for the reply. Yes, I have tried the 75Hz refresh rate but it still looks the same. It is a CRT, and I can't return it. The year it was manufactured was 1998, but it's never had this problem before. It's a 21-inch monitor, so maybe it has power supply issues if the picture is pulsing larger and smaller. I wonder what caused the problem, because it wasn't here when I first got it.