Question about Toshiba 55H70 55" Rear Projection Television

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Apparent problem with red projector?

TV is about 6 years old and have noticed lately that it takes a minute or two for the picture to "sharpen" after having been off awhile. Tonight turned it on and picture went out and got blinking red power light (no picture or sound). Opened back panel and removed the red connector at the very back of the board behind the STK's. After I plugged the TV back in, the picture and sound came back fine. Plugging the red connector back in (after power off/on) causes the blinking red light again. Does this sound like a problem with either of the two boards connected to the red projector or the red projector itself? Wondering on a cost estimate for parts and if it is even worth repairing. Thank you. Doug

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  • tigernut Aug 24, 2007

    Did some more troubleshooting tonight and found that the problem lies somewhere on the STK board.

    I can plug the red connector into either the blue or green plug and the red turns on fine.

    Possibly a problem with one of the STK's?

    Would be helpful to have a schematic to look at.

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Service manual here
http://www.eserviceinfo.com/
I would not replace one stk but all....
more info here:
http://www.digitalhome.ca/forum/search.php
http://www.digitalhome.ca/forum/showpost.php?p=564268&postcount=220
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

Posted on Dec 05, 2007

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