I have an LG Flatron W2234S 22" LCD monitor.
When I first turn on my monitor, the picture is fine. However, as it warms up to normal operating temperature, the screen will begin to flicker between normal and a purple "tint" or "haze" (as if there is not enough green to balance with the red and blue). For example, the tint will make gray colors look purple and yellow colors look red. The tint shows up against darker colors more than lighter colors.
Here is a picture of the monitor displaying a color test pattern (notice the drop in green):
http://img706.imageshack.us/img706/4199/badmonitor.jpg
Eventually, the flickering between normal and purple tint gets worse, until purple haze mode takes over and it won't flicker back to normal, unless I turn off the monitor and let it cool off for several hours.
Your LCD monitor has bad ccfl lamps or inverter circut..
Hi,
When it does off picture after sometime and then back again. It's due to the 'power transistors' in the VGA card part overheating after becoming a bit old, or the one's in the panel. It's not really economic to buy a replacement panel at 70% of a new LCD. Can buy a replacement VGA card for 30%. The parts number are Manufacturer Part Number EBU59489401 Board Numbers 791501300700R For a replacement card
if no warrenty, $50 search google/ebay.
Else the W2234s is very easy to dissassemble from it's cases. And put a house fan at the back @ to provide the extra cooling to keep it going, if it's not to bad. Keep fingers to the sides of the boards else !
I had flickering, then it went black. little blue led would then blink. solution was alittle barbaric but did the job. a swift slap to the back of the monitor and disable screen saver/standby. havent had a problem in 30 days so far.
note: I sent this unit to LG 3 times for warrenty repair. Issue was never resolved and warenty expired.
Inspect the caps in the Logic/LCD driver board and in the power supply/inverter board, look for caps with bulging tops. See example here:
http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net
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Yes. In fact, I tried a second VGA cable just to make sure that wasn't an issue. The problem continued witht he second VGA cable.
I also tried using a second monitor to ensure that it wasn't a problem with the video card itself. The other monitor worked fine with either VGA cables.
I believe this narrows the problem down to the monitor itself.
Did you check the VGA cable plugs at both ends?
Yes. I checked to make sure both VGA cables, and associated plugs, worked correctly. I even hooked up a different monitor, using each of the two cables, to ensure that the problem was with the monitor and not the cables or the video card. The different monitor worked fine, with no tint, and no problems.
Well, I checked the capacitors, and none of the capacitors had bulging or broken caps.
Unfortunately, in getting to the circuit boards to check the capacitors, I destroyed one of the plugs, so I guess this ends this problem...Thank you for your help!
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