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Shahid
Shahid, Technician
Category: TV
Satisfied Customers: 11424
Experience:  I have been repairing electronic gear since 1993 as a qualified Sony tech
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Lc460WUE, plugged in, no indicator light, 5v fluctuates from

Customer Question

Lc460WUE, plugged in, no indicator light, 5v fluctuates from 5v to 3 back up to 5, etc etc. Got it with no back, and theres a little blue capacitor? Thatbis obviously burnt on the PSB. Need to find out ehat it is, how to source a replacement to proceed with this one
Submitted: 9 months ago.
Category: TV
Expert:  Shahid replied 9 months ago.

Hi, my name is ***** ***** I will do my best to help you today. To make sure I don’t miss anything, please give me a minute to review your question.

Expert:  Shahid replied 9 months ago.

It seems Lc460WUE is display panel part number, can you get me the TV model number and what is the brand name usually written on lower front of bezel?

Customer: replied 9 months ago.

Havent done any more testing yet

Expert:  Shahid replied 9 months ago.

Attached picture shows part of a circuit board.

Customer: replied 9 months ago.

Its an LG, no clue what the model is because it didnt have a back on it when i got it. Would it be stamped on the chassis somewhere?

Customer: replied 9 months ago.

From researching main board, I think its an LG 47LH30UA.

Expert:  Shahid replied 9 months ago.

I'm not sure about the model number either, there could be a label pasted on display panel chassis for model number that will help to get related manual/ info.

Customer: replied 9 months ago.

Im almost positive thats it....LG47LH30. You got another incoming question now

Expert:  Shahid replied 9 months ago.

Nice, standby volts fluctuation indicates it is either capacitor on power board problem or main board has short on 5V line and causing the volts drop.

Please check the capacitors of power board, disconnect main board from power board, put a 6V bulb on 5V output/ stadby pin of power board and plug TV power cord in to see if 5V stays constant.

This test will help to determine if standby power section is working fine or not. If volts stay constant then main board is defective.

Customer: replied 8 months ago.

Kk, will check. That blue capacitor is SIX KILOVOLTS!!! WAY high for a button capacitor....can you maybe check it out for me, and see if the rating is correct? And how do I test these? Out of circuit with the autoranging tester?

Expert:  Shahid replied 8 months ago.

Ed, is the blue capacitor has 22J written on it?