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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Help needed with identifying cause for dirty white illumination in LCD monitors. Looks yellowish / off white!
Hi,
I am just getting into LCD repairs and I have a batch of liquidvideos L17LCD2's .. They all seem to exhibit the same picture quality when it comes to the whites!.. All display an off white with or yellowish tint instead of a clean white background. I am unable to adjust it out in user settings. Before I order new ccfl lamps I want to be sure if what I'm experiencing is a common symptom of the lamp starting to go. Want to be certain it's just not inherent to cheap LCD monitors. Could even the filters be yellowing for some reason perhaps? Thanks for any insight! Chad. www.arcadecup.com |
#2
Posted to sci.electronics.repair
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Help needed with identifying cause for dirty white illumination in LCD monitors. Looks yellowish / off white!
On Jul 21, 2:35 am, Chad Entringer wrote:
Hi, I am just getting into LCD repairs and I have a batch of liquidvideos L17LCD2's .. They all seem to exhibit the same picture quality when it comes to the whites!.. All display an off white with or yellowish tint instead of a clean white background. I am unable to adjust it out in user settings. Before I order new ccfl lamps I want to be sure if what I'm experiencing is a common symptom of the lamp starting to go. Want to be certain it's just not inherent to cheap LCD monitors. Could even the filters be yellowing for some reason perhaps? Thanks for any insight! Chad.www.arcadecup.com It's the lamps. But think twice about getting into replacing CCFL's. Often they're buttoned up under layers of covers, tape, aluminum tape, and glue. They're about as fragile as a supermodel's marriage and emit a few milligrams of mercury vapor when you break them. And you will break them, both old and new, until you get the technique right. It takes the steady hands and sharp eyes of a surgeon to R & R these and get a good outcome. |
#3
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Help needed with identifying cause for dirty white illumination in LCD monitors. Looks yellowish / off white!
"Ancient_Hacker" wrote in message ups.com... On Jul 21, 2:35 am, Chad Entringer wrote: Hi, I am just getting into LCD repairs and I have a batch of liquidvideos L17LCD2's .. They all seem to exhibit the same picture quality when it comes to the whites!.. All display an off white with or yellowish tint instead of a clean white background. I am unable to adjust it out in user settings. Before I order new ccfl lamps I want to be sure if what I'm experiencing is a common symptom of the lamp starting to go. Want to be certain it's just not inherent to cheap LCD monitors. Could even the filters be yellowing for some reason perhaps? Thanks for any insight! Chad.www.arcadecup.com It's the lamps. But think twice about getting into replacing CCFL's. Often they're buttoned up under layers of covers, tape, aluminum tape, and glue. They're about as fragile as a supermodel's marriage and emit a few milligrams of mercury vapor when you break them. And you will break them, both old and new, until you get the technique right. It takes the steady hands and sharp eyes of a surgeon to R & R these and get a good outcome. It depends, some are very easy to replace, others are nearly impossible. Pull the lamps out of one of the monitors you have first to see if it's something you want to do multiple times. Also at that time you can power it up and verify that the lamps are in fact off color. It is possible though unlikely that the plastic light guide or reflector has yellowed from the UV or heat. |
#4
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Help needed with identifying cause for dirty white illumination in LCD monitors. Looks yellowish / off white!
"Chad Entringer" wrote in message oups.com... Hi, I am just getting into LCD repairs and I have a batch of liquidvideos L17LCD2's .. They all seem to exhibit the same picture quality when it comes to the whites!.. All display an off white with or yellowish tint instead of a clean white background. I am unable to adjust it out in user settings. Before I order new ccfl lamps I want to be sure if what I'm experiencing is a common symptom of the lamp starting to go. Want to be certain it's just not inherent to cheap LCD monitors. Could even the filters be yellowing for some reason perhaps? Thanks for any insight! Chad. www.arcadecup.com What environment were they operated in? Cigarette smoke/nicotine? Deke |
#6
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Help needed with identifying cause for dirty white illumination in LCD monitors. Looks yellowish / off white!
Cool thanks guys... yes I already did some dry runs removing the bad
bulbs... They do snap very easy very fragile and delicate process indeed. Just getting to them the first time was a task. removed the end caps also no problem. Wow the housings for the lamps are actually yellowed pretty bad... the rest looks great such as the plexi panel, sheets, white sheet. is it possible that the small amount of space the yellowed case for the lamps takes up would be the cause?.. Anyone have any tips on what to use to recolor these white and see if that makes a dif? I suppose I will find something temporary for now... If it's the cure I would like something that will hold its white under heat and reflect decent... |
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