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D52W20 turns on and off

 
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troglodyte
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PostPosted: Mon Oct 20, 2008 11:01 pm    Post subject: D52W20 turns on and off Reply with quote

I have a D52W20 that stopped working. I was in the service menu (not the main menu) just looking (no changes made yet ) and the tv just shut off. I tried turning it back on and all I got was a high pitched squeal and the power light comes on for 2 sec, goes off, then blinks on for a sec, goes off,then back on for 2 more sec and then the tv goes off. It will keep doing this until I unplug it. I thought I might have changes a setting or something but have unpluged it for weeks now which is what is supposed to reset the TV, Even removed all boards and still nothing. I have already replaced the flyback.
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minnie



Joined: 18 Aug 2005
Posts: 2877
Location: Hell

PostPosted: Tue Oct 21, 2008 12:06 am    Post subject: Reply with quote

The high pitch squeal is usually a shorted horizontal output transistor. It's on the heat sink by the flyback. Also check the caps for mushroomed tops in the power supply. You have to read the HOT out of circuit.
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troglodyte
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PostPosted: Tue Oct 21, 2008 12:10 am    Post subject: Reply with quote

Thanks for the quick response.

No mushroomed tops on the power supply board.

I will check the transistor. Were would I find the replacement part number?
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minnie



Joined: 18 Aug 2005
Posts: 2877
Location: Hell

PostPosted: Tue Oct 21, 2008 11:59 am    Post subject: Reply with quote

2SDXXXX. Post the numbers listed on the transistor.
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