TV/VCR/Stereo Troubleshooting/LG 42

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Question
QUESTION: I am working on a 42" LG plasma TV that shuts off seconds after turning on. A check of the Va and Vs shows they do not completely power up fully before turn off. When Y-sustain is disconnected TV powers up normally with normal Vs and Va and audio is heard. I reconnected y-sustain and disconnected z-sustain and y driver pcb's but TV would still turn back off. I replaced the y-sustain and have the same problem. Disconnected panel cables from y driver board and still same problem. Checked for shorts on driver board but found nothing. What is your opinion on what could be wrong? Thanks

ANSWER: what is your model number?

Allan

---------- FOLLOW-UP ----------

QUESTION: Sorry, I am working on a 42PG20

Answer
very odd problem you are having here for this model.
1. are the VS and VA normal voltages with the y-sus unhooked?
2. where did you get your y-sus? just wondering if it was used and you got a bad one?

also maybe the power supply does not have enough current and when the y-sustain is hooked up it loads the power supply down...

let me know?

Allan

TV/VCR/Stereo Troubleshooting

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Allan Wainwright

Expertise

I have over 22 years of experience repairing and training technicians on how to repair TVís, working on the phone all day with techs all over the world. I specialize in home service of Projection, DLP, LCD and plasma televisions. I can fix most issues right on the spot and I am very good at answering questions and troubleshooting on MOST makes and models. IF YOU ARE IN ORANGE PARK,FL OR JACKSONVILLE,GREENCOVE. THEN I CAN FIX YOUR TV IN YOUR HOME. CALL ME AT TV REPAIR, BIG SCREEN TV REPAIR, IN HOME SERVICE www.tvdoctor.us

Experience

In order to properly assist you, it is very important that you provide the Model number of the television and the year it was manufactured. You can find this information on the back of the TV. Please also let me know if you are trying to fix the unit or just need to know the cost for repair. If you have a digital camera, and know how to solder and use a meter, I can help you fix your unit in most cases.

Education/Credentials
I have over 22 years of experience repairing and training technicians on how to repair TVís, working on the phone all day with techs all over the world. I specialize in home service of Projection, DLP, LCD and plasma televisions. I can fix most issues right on the spot and I am very good at answering questions and troubleshooting on MOST makes and models. IF YOU ARE IN ORANGE PARK,FL OR JACKSONVILLE,GREENCOVE. THEN I CAN FIX YOUR TV IN YOUR HOME. CALL ME AT TV REPAIR, BIG SCREEN TV REPAIR, IN HOME SERVICE www.tvdoctor.us

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