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sharp 21V-J70M yellow picture w/ sound then goes out in seconds

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egm:
to all,
 
Pls help me, when I turn on my sharp tv there is a yellow display with sound but it goes blue dark and cant see any more the image and also the sound gone. I have already replace TA8403 have also check Hor. driver and Hor. out but its ok. I will really appreciate your help thanks..

egm

Turnip:
Hi there,

   Don't recognise the model, but yellow pic might indicate a tube fault. Sharp often used Philips tubes which tend to go cathode/grid (A1) short on one or other colour gun. Suggest giving the tube neck a gentle whack before it cuts to standby - might prove something.

   Good luck - Chris.

egm:
Thanks chris,

I'll try it that way when I have time I'm in night shift sched this days I don't got much time yet..

rgrds,

ed

egm:
hi

I have tried your advice but I got no response from the tube, I have tested some capacitors and diode but it seems all good what have I noticed that when it warms it turns to blue dark as well as the sound disappear. Thanks


ed

 

Turnip:
Hi Ed,

    Just gave general advice as I couldn't relate the model number to a main board that I could recognise. Some additional info might be useful.

    Chris.

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