Monitor problem - Dark colors, slow screen refresh
I have a Viewsonic VG900b monitor that recently just started to show some very strange problems. First the colors have all gone dark, as if someone had turned down the Brightness all the way. I can still see everything, it's just very dark.
More annoying though is that the screen refresh is painfully slow on all operations. Moving the mouse is a chore, with the screen being refreshed about one time per two seconds (fading from one refresh to the next). Even pressing the 1 and 2 keys on the monitor have a very slow (and fading) refresh, and "Auto Adjust Image" and "Screen Resize" have no effect. Also, I have switched this monitor to other Windows AND Macintosh computers with the same result, so I'm pretty sure it's not a software driver problem.
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Re: Monitor problem - Dark colors, slow screen refresh
It sounds to me like the picture tube in the monitor is going out. I began to wonder if it was your video card until you mentioned that you used it with various computers. This tells me it's the monitor itself. Unfortunetly, I think your monitor may be due for retirement.
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If your LCD TV or monitor has stopped working, or is displaying one of the following symptoms, then it's a candidate for some new capacitors
- Flickering screen
- Screen image disappears after several seconds
- Dim screen
- Slow start
- Power LED on, but no picture
- Unusual colors and/or lines
The primary cause of LCD TV and monitor failure is caused by faulty capacitors. You can examine the capacitors in your LCD TV or monitor and actually see if they are bad.
If they appear bulged on top, then they need to be replaced.
New capacitors will solve a host of problems in LCD monitors and TV's and will extend the life of your monitor or TV by several years.
Take it to a repair shop.
the monitor may be going into power save mode which it should come out of when you press a key or move the mouse but it sounds like you have tube inverter issues.
Your screen has light tubes behind it to illuminate the screen, if the tubes or the inverter develop a fault, then a very dark screen can result as the tubes are turned off.
There may also be an ambient light sensor which will darken the screen in low ambient light. If the sensor is faulty, darkened screens will result. If the inverter is failing, you may be able to replace it, contact viewsonic. if the tubes are failing, replace the panel or the entire monitor. If the ambient light sensor is faulty, replace the panel or entire monitor as the sensor is part of the display panel.