Question about Toshiba 50HP66 50 in. Plasma Television
I replaced the power supply board, and the scaler board still no picture but sound.
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Posted on Jan 02, 2017
Check mosfet at Q104 2SK2370 which will sub to an Nte2970 on the main power supply. Leakage can cause cycling but my bet is on the scaler board also. You say you have +5v at pin 11 of CP3201 and 3.3 at pin 2 of IC3804 - and all the troubleshooting charts and schematics I've reviewed suggest replacing the scaler board, Toshiba p/n# 72784101 and unfortunately they're about $240.00 dollars. But that sounds like the problem to me...
Posted on Dec 01, 2007
Generally this problem is in your signal board. You may also know it as the scaler board, as you mentioned. I have not repaired this particular model. But I would first suspect the the signal board (scaler). If you are not sure what this is, it is the board with all the RCA Jacks and RF connections. The problem in this area are bad or failing capacitors. Thanks for asking and show all hands of support!
Posted on May 02, 2011
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