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Pete, Electronic Engineer
Category: TV
Satisfied Customers: 17338
Experience:  Over 16 years of experience installing and repairing electronics.
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I have a Panasonic TC-P50S30 that has 7 blinking lights. i

Customer Question

I have a Panasonic TC-P50S30 that has 7 blinking lights. i replaced the SD,SU, and SC board with supposed known working parts but no luck. I tested both SC boards with buffer boards disconnected. both powered on w/o issues, but my original board lit up as purple and black. Does this mean my buffer boards are bad or the sc is bad even though no SOS code?
Submitted: 2 years ago.
Category: TV
Expert:  Pete replied 2 years ago.
Hi there, If the TV still shows 7 blinks after replacing the SD,SU, and SC boards then I would say buffers are faulty and will need replacing too.Faulty buffers are a fairly common fault on these older sets.
Customer: replied 2 years ago.
Is there a way to test the buffer boards other hen disconnecting one at a time to see if one or both boards are bad?
Expert:  Pete replied 2 years ago.
Only by swapping in a good board and checking if the TV comes on; however the buffer boards should always be replaced in pairs.
Customer: replied 2 years ago.
Are thereany places you recommend where I can source new boards. Most go to sites like shop jimmy have been sold out for a long time
Expert:  Pete replied 2 years ago.
The buffer boards used in your TV should be TNPA5336AB/TNPA5337AB.You can also use TNPA5336AG/TNPA5337AG (the only difference is that the 'G' boards have additional heatsinks fitted).These boards are no longer manufacturered and are very difficult to source - your best bet is another broken TV set with good buffers in it, or eBay or similar sites.