Question about Sony FD Trinitron WEGA KV-32FS120 32" TV

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My Sony Trinitron won't turn on...has 4 blinks in Standby.

My Sony Trinitron was working one minute....I put my TVR on pause and now my TV screen won't turn on...has 4 blinks in Standby. I've tried the hard reset..leaving it turned off for 5 hours..nothing. I understand according to previous articles about this that I'm supposed to "Check IC1509, Q1505" but what does that mean? How do I do that? Thanks for any help you can give.

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  • 2 more comments 
  • nc8tn Sep 05, 2008

    Thanks, Dan. I actually realize now that may model is different. Will that matter? My TV is a Sony Trinitron KV 27V40.

  • roy2008 Sep 07, 2008

    same here, the same tv, same brand, it finally happen after two years I bought this TV, 32 inch sony KV32, I don't have solution yet.

  • wtkelly Sep 07, 2008

    Mine has the same problem. Been an excellent tv going to take it apart and try to fix iy.

  • nc8tn Sep 12, 2008

    It just occurred to me that the day this happened last week, there was a big rain storm. Since the TV was plugged directly into a wall outlet (not into a surge protector), could this 4 blink diagnostic signal indicate it was fried by a power surge?

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  • 4,234 Answers

This may be a vertical circuit problem. IC1509 is usually the vertical IC. If you can solder, I would first try an resolder the pins on this IC. If that fails to resolve it, replace the IC. This IC is a small flat IC attached to a heat sink with about 11 pins. It will be marked LA7837 or something similar. Feel free to post the marking and I'll confirm you have the correct IC.

Keep me posted.
Dan

Posted on Sep 05, 2008

  • ABRsvcs Sep 05, 2008

    Usually the blink codes are the same, but I'll look up your specific model tonight and post the specific parts for you.



    Dan

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1 Answer

My tv whe I turn it on will only stay on for 4 seconds and then turns off, and the stand by light is on and blinking.


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The standby light should be blinking in a pattern. Count,pause,count... Please post the count and that will indicate the circuit in which a problem was detected. That will allow me to give you details and possible solutions.

Thanks,
Dan

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Stuck in standby


The 4 blinks indicate a vertical deflection problem. Either the connections on the legs of the vertical IC are bad or the IC is defective. If you can solder, you can fix this yourself. Let me know if you wish to attempt the repair and I'll provide more details and instructions.

Dan

Oct 02, 2008 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

My Sony Trinitron won't turn on...has 4 blinks in Standby.


Hello,
There are 3 reasons for 4 blinls
1.unit went to stand by mode because of h-pulse
2.Vertical defflection pulse stopped
3. power line is shhorted or power supply is stoped.

Solution:
1. check 13vdc on A board of powersupply stage
2. Check IC561 on A-board.

Good Luck
Dals123

Sep 08, 2008 | Sony FD Trinitron WEGA KV-32FS120 32" TV

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