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

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Picture went blank during viewing

While watching TV, the picture suddenly went dark. Sound OK, connections and cable transmission OK. Is taking it to the shop (or having a repairman come to the house) a must? Is there any way for me to run diagnostics on it?

Thanks

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Not too many things you can do without an understanding of the circuitry in a CRT TV but there is a good chance that the failure has occurred in the high voltage area and a few things need to be measured there to find which of them has failed. Catastrophic failure of the CRT (picture tube) are rare anymore but do happen now and then.
If the flyback (horizontal output transformer) has bitten the dust, they are becoming hard to find and much more expensive than 10 years ago. Additionally, those don't normally fail alone but are killed by or kill, other components, which also need to be verified before replacing anything.   
Even with the HV section dead, there are lethal voltages present inside when turned on and not always in places that look dangerous. 

Posted on Sep 15, 2008

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