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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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Laptop LCD lamp repair... Inverter or lamp?
Hello,
Dell Latitude CPx. The LCD does come on and lights the entire screen, but there is a flicker in the screen at probably around 7-15hz. Very annoying. It doesn't go completely dark when flickering. I have the inverter out of the unit, but the lamps on this model are a littler harder to get to. What is the most common point of failure? The inverter or the lamp(s)? I'm thinking about house hold fluorescents and when they flicker, sometimes it's the bulb, sometimes it's the ballast. Only difference is it's a helluva lot harder to change the bulbs in a LCD screen than a fluorescent fixture. Thanks for any help, Jonathan |
#2
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Laptop LCD lamp repair... Inverter or lamp?
Without trying parts, it is very difficult to tell. The ballast supply for
the lamps is a constant current type supply. The lamps and supply should be changed together. -- JANA _____ wrote in message oups.com... Hello, Dell Latitude CPx. The LCD does come on and lights the entire screen, but there is a flicker in the screen at probably around 7-15hz. Very annoying. It doesn't go completely dark when flickering. I have the inverter out of the unit, but the lamps on this model are a littler harder to get to. What is the most common point of failure? The inverter or the lamp(s)? I'm thinking about house hold fluorescents and when they flicker, sometimes it's the bulb, sometimes it's the ballast. Only difference is it's a helluva lot harder to change the bulbs in a LCD screen than a fluorescent fixture. Thanks for any help, Jonathan |
#3
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Laptop LCD lamp repair... Inverter or lamp?
"JANA" wrote in message ... Without trying parts, it is very difficult to tell. The ballast supply for the lamps is a constant current type supply. The lamps and supply should be changed together. I think I've only ever replaced the lamps once, usually the only problem is the inverter. |
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