Question about RCA L32WD14 32 in. LCD Television

1 Answer

Picture & sound shuts off

Picture & sound shut off after a few minutes of being on (not the tv itself). A few seconds later the tv turns off. Power indicator light blinks red. After unplugging and plugging back in, tv is on without having to push any buttons. Same result, picture & sound, then the tv shuts off, red flashing power light.TV STAYS ON FOR A FEW MINUTES THEN STOPS COMPLETELY.

POWER SUPPLY OK (24V OK, 12V OK, 5V OK)
iNVERTER BOARD OK (HV OK + CONTROL SIGNALS OK)

TEST ON VARIAC 70 VAC TO 135 V...OK
TEST WITH HOT AIR INJECTION...OK

INTERMITTANT MICROPROCESSOR???

PLEASE SEND SOLUTION ASAP! THANK'S

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  • RCA Master
  • 19,396 Answers

You need to replace either the power supply or a component on dm board.

Posted on Feb 24, 2009

  • Ginko
    Ginko Feb 24, 2009

    Hi, if the TV is shutting down after a while you need to test components that are affected by overheating or that can fail when operating at certain frequencies.

    Test the power adapter, and the STKs on conv. board, this can overheat.

    Also a faulty jungle IC can give you weird problems of this kind.

    Check also the ceramic filters on ir circuit, they can fail at certain frequencies and cause the same.

    Test also all solder joint, in case the fault is related to a bad solder joint and TV is turning off because of vibrations breaking a contact on a cold solder joint.


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