Question about Sony Grand WEGA KDF-55WF655 36" Rear Projection HDTV

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Tv won't turn on red lights blinking

When i turn the tv on a buzzing sound comes from the back panel
part #1-488-875-11. when the buzzing sound comes on a little cylinder shaped thing in the back turns on and off with the buzzing sound.
the lamp light on the front blinks red.

my tv is a sony kdf-55wf655 55inch

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  • harper_j97
    harper_j97 Aug 14, 2012

    How can you bench test the lamp? I'm having identical issues with KDS-50A2000

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  • 184 Answers

You are hearing the spark gap mounted on the lamp ballast board. If you can hear that sound, that means everything in the lamp driver circuit is working except the lamp!

Get a new lamp.

michtech

Posted on Feb 20, 2009

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Hi Charles,

Sorry for the late reply, I'm offline upon purchasing my service.
You have said that you can hear a low buzzing sound before the unit gone to subsequent shutdown and the lamp blinks green(meaning that the unit try to turn on the lamp for consecutive attempts but not generally mean that the lamp itself is faulty.) and the temp led light come on.

As a matter of fact all the information you have mentioned linked to the symptoms you've encountered right now. A low buzzing sound might be caused by faulty FAN inside the unit that trigger the error code (blinking of the standby/temp led light) and turns off the unit automatically due to thermal protection circuit.
However, the technician might be true also that the buzzing sound came from the faulty color wheel. To confirm it, you have to verify where the buzzing sound came from. Color wheel is in front of the lamp assembly. Faulty color wheel can produce the same symptoms you've encountered right now but most of the time, it shows 3 blinking led light at the front panel (Timer, Lamp, standby/Temp).

I would advice you to open the back cover of your unit, fixed the lamp door safety switch with the tape to make it in closed position( if it is on open position the unit will not power up), and then turn on the unit and observe the fans if will spin or not, and check also where the buzzing sound came from before the unit gone to shutdown.
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