Question about Hitachi FDX Series 43FDX10B 43" Rear Projection Television

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Power Problem My television recently stopped working altogether. I turned it on and was watching it for a few minutes and it lost the picture and sound. The red LED indicator on the front was on (as to show that the unit has power), but there was no picture and no sound. I turned the power off and unplugged the TV and then plugged it in again and tried turning it on. The same thing happened. The red LED indicating power turns on in the front, but neither the picture nor the sound come on. If I listen carefully, I can hear a quiet oscillating sound coming from the back of the TV. Is it possible that an internal power supply or internal fuse blew? Please help.

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Re: Power Problem

Most often this problem is caused by convergence ic's. STK392-110. Sometimes cause is vert. i.c. Also, many times it is from bad solder connections on circuit board. In any case, short of unplugging unit to reset, there's not much you can do without help from repairman.By(1)removing rear cover,(2) unscrewing 2 screws holding chassis in and(3) undo all clips and wire ties holding wiring in place. Small board on (R) side is conv. Slide entire chassis towards you. Remove 3 screws from small conv. board.Remove and mark 5 plugs and 4 black jumper plugs to free board. Look at bottom of board for rings around solder joints at pins of main amps.(STK392-110). Resolder or replace amps and reinstall board. Reconnect 4 jumpers and 5 plugs in same order. Power up unit and hit magic focus. This is most common repair.

Posted on May 12, 2008

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