Question about Sony KV-27V42 27" TV

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Sony 27" XBR failure

TV is >10 years old. Failure mode is second-hand from my daughter, but while watching she described the picture slowly shrinking to a small circle in center of screen. Turn-off and turn-on worked very briefly, then the same thing happened. I tried unplugging, plugging directly into wall, TV does not respond to remote or power switch. No sound, no lights, nothing. Sounded like blown tube, except for the fact it came on a second time. Any thoughts? Thanks.

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Re: Sony 27" XBR failure

I will suggest dont ise it until someone who is qualified comes over to give you an estimate,I belive you have a lot of loose conections in the horizontal driver and output circuits,power supply and crt board.Should not be expensive to repair right now. Good luck.

Posted on Sep 18, 2006

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I have the sony 32' 10 years ago. Today I turned the TV only I learned that top half is totally black the bottom half is fine. Please let me know the problem and can we solve it. Thank you very much!

This can be caused by several different things.
Among them are: tube failure, digital comb filter failure, convergence failure, capacitors failure, i.c. faults, power supply providing incorrect voltage.

Unfortunately, being that your tv is so old, there is very little that can be done other than get a new tv.

It is because the repairs will cost as much as a new tv.

I'm sorry your Sony gave out on you, but 10 years is a good long time in the life of tv's nowadays.

I hope you get another that gives you as many years enjoyment, or more!

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Did you get your set fixed or did you replace it? My same set did the same thing. Turned it off for 2-3hrs after watching it and when I tried to power it up- nothing but the sound it would normally make just before the major power up, sort of a relay click sound. No picture or sound but the red light blinks non-stop.

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An experienced TV service tech can troubleshoot the set and give you an estimate for service. Considering the age of the set, the cost of service may not be worth it.

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My 27 inch TV's (A Sony and a Sharp) are pretty old and I would fix them myself if the picture tube was very good.
This may be a very good time to buy considering the discounts being offered. ;-)).

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The high voltage circuit also runs the horizontal deflection circuit and much of the rest as well. The horizontal problems you describe were a prelude to high voltage failure. If the TV is anywhere near 10 years old (how come you guys never give the age????) it isn't worth the cost of overhauling the high voltage circuit. You might be able to replace just the H.O.T. but the flyback is the source of the failure.

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Picture tube failure is rare problem. Your problem is powersupply failure and short circuit in deflection area. This is quite common problem. My sugestion is before you got this problem picture clarity and color clarity is better perfomance in your satisfaction means repair is better. Otherwise replace it.

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