I have not as yet opened the case of the monitor. I did call and e-mail KDS ( Korean Data Systems) with my questions. I received a reply in one day from their monitor repair expert. He said it was probably a bad CRT (cathode ray tube) and that I was lucky that it had lasted six years. He said I could try a rejuvenator called Sencore 2000, but any improvement would not last more than a year. I am not quite sure what a rejuvenator is or does. He said a new monitor was the best way to go. Thanks to all for the helpful suggestions and cautions.
Wally On Sat, 24 Jul 2004 09:56:07 -0500 "Support-OrpheusComputing.com" <[EMAIL PROTECTED]> writes: > Is this a CRT or LCD? Assuming it's a CRT, usually on the PCB > on the CRT neck/yoke, there are RGB adjustments. > > I CANNOT EMPHASIZE ENOUGH the following: UNPLUG the monitor > and LEAVE IT unplugged for several days. The caps (capacitors) > can and WILL retain a charge for even weeks, and they can and > will hold the charge for the flyback which can be 20-40,000 > volts and even higher, if you should happen to touch anything > in that area. Wear RUBBER GLOVES that have a dielectric high > enough to insulate against this type of voltage. Then, search > for the pots. Usually the pots can be adjusted with fingers, > but if not, DO NOT use a metal screwdriver, use a plastic one > or make one out of something wooden. Once you have them > located, you'll have to turn the monitor back on and somehow > SAFELY as I suggested, adjust the pots. I've been shocked > numerous times over the years still even following safe > guidelines, because sometimes you can and will "slip" and touch > something that is holding a high residual charge. > > Since white is "white", then they should not need adjustment > and it may not help. If you adjust so gray is gray, white may > no longer be white. Best thing is a CRT test pattern. Some > monitor manufacturers offer these, if not you can search and > maybe find one you can download. It also could need a CRT > booster to fix the problem, or the power supply could be "going > down" a bit. > -Clint > > God Bless > Clint Hamilton, Owner > http://OrpheusComputing.com ) > > ----- Original Message ----- > From: <[EMAIL PROTECTED]> > > > I have a KDS KD-5250 15" monitor which does not > display the colors properly. When white is required, the > three color guns are full on and white is displayed. This > is as it should be. > When shades of gray are required, each color gun should > reduce its intensity in such a manner that the brightness of > each color phosphor decreases an equal amount. This produces > darker shades of gray. The green gun does not reduce > its intensity as much as the red and blue guns which results > in a dark green field instead of a gray field. > There are no external adjustments for color balance. > Does anyone have any suggestions concerning what internal > adjustments can be made to the separate color gun amplifiers > in order to correct this problem? I have not as yet opened > the monitor case so I have no idea what adjustments are > available in this monitor. > > Wally ________________________________________________________________ The best thing to hit the Internet in years - Juno SpeedBand! Surf the Web up to FIVE TIMES FASTER! Only $14.95/ month - visit www.juno.com to sign up today! ============= PCWorks Mailing List ================= Don't see your post? Check our posting guidelines & make sure you've followed proper posting procedures, http://pcworkers.com/rules.htm Contact list owner <[EMAIL PROTECTED]> Unsubscribing and other changes: http://pcworkers.com =====================================================
