Question about Televison & Video
LCD TVs do not have convergence circuit. If display shrunk then it is likely the T-Con board. The other option is a defective PSU that caused the whole TV to malfunction and shut down.
Note: If the technician has opened and tested the TV, and he found the T-con board is faulty, then the TV is not worth repairing. The below is in case the technician did not test the TV.
When you go to a repairer they always give you a quote on the most expensive fault. The only other option to get a quote is having TV tested. If it is PSU, then repair will be below $200 (DIY below $100 if you know how to test).
The problem with the T-Con board is that with most TV models the T-Con board is not sold as separate part, but as one single part integrated with the display panel. Because of this reason when problem is T-con board, the TV is not worth repairing.
About the PSU, the LCD power board is quite difficult to test for a person without technical training. Sometimes it is however possible to spot bulged or melting capacitors or burnt areas.
A PSU for an LCD TV is usually below $100. The part must be tested before replacement.
If TV has already been tested and the tech found a defective T-Con, then replacing the PSU will unlikely help (PSU is the first part we test).
I can be more specific on parts' price if you give me the TV make and model number.
Posted on May 18, 2011
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Posted on Jan 02, 2017
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