Question about Toshiba 57HX81 57" Rear Projection Television
In this model it should be short protection--I suspect the convergence chips--each is protected with a pico fuse--two identical voltage sources--one is a positive and the other a negative voltage--if either blown--locate the chips and unsolder both--with fuse replaced and chips not soldered in--see if set comes on--if it does convergence will be out the window but you will know one of the chips is shorted--there are also number of protect resistors around them--usually 1.2 or 1.5 ohm--they will look perfect but if open.....
Let me know what you find.
Posted on Sep 28, 2010
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Posted on Jan 02, 2017
Tips for a great answer:
SYMPTOM: Won't turn on or intermittently won't turn on, Red LED Flashes.
CAUSE: Loss of Main Switched Power Sources. Standby power is OK.
SOLUTION: Replace Regulator IC Q820 with Toshiba Part # 23135094
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