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I have a 30 inch prima/arrow lcd tv which powers up but doesnt remain on for longer than 20 seconds

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  • craquer69 Jul 12, 2009

    the units red led comes on, there is a three second period when the screen lights up, then power supply emits a high pitch sqeal (not very loud) and the screen dies and the red power led blinks twice and goes out.

    The unit is marked "arrow LCDTV30A"

  • craquer69 Jul 12, 2009

    the unit is a flat screen 30" LCD TV not a rear projection

  • craquer69 Jul 12, 2009

    ALL caps in the p/s have been changed i was thinking inverter but can not get any documentation on arrow LCDT30A

  • craquer69 Jul 12, 2009

    This IS NOT a projection tv it is a flat screen LCD.
    It has no lamp save for a cold cathode tube.
    ALL the caps in p/s have been replaced.
    THIS UNIT IS MARKED ARROW LCDT30A

  • craquer69 Jul 12, 2009

    i replaced the caps i am a technician with thirty years of experience in fixing tv's.
    These units were made by a chinese company and were branded arrow or prima.
    I have repaired dozens of these tv's before with power supply cap's but this one is not responding to the common faults

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  • 3,037 Answers

The tv is probably pulling too much power and so shuts off. Does it have picture and audio before turning off? Are there any blinking lights or anything after it turns off? Unless I get a blinking code or anything, a person with electrical experience is going to have to narrow down the problem since the tv shuts off to protect itself. Could be the power supply or a number of other things. One quick thing to try is to plug the tv into a surge protector or if it is in one, plug it directly into the wall and see if that changes the time it takes to turn back off.

Benjamin

Posted on Jul 12, 2009

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When I turn on my Sony TV, ti stays on about 30 seconds then shuts off, What do you think is wrong?


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http://www.youtube.com/
maybe no +5v going to mainboard..
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