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Re: sound,but no pic
Sadly this is a third tier set and service is almost unavailable, it sounds like the inverter board or part of the power supply has gone bad..i think they have a flat rate policy,,you need to contact the manufacture directly
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you have to be a bit more specific than that. Did you notice anything beforehand? Was it On when it stopped working, or did it just stop turning on? Is there sound? Power light still on but no pic or sound? Do you get power surges (lights sometimes get bright or dim in your house). that kind of stuff :)
The most likely the TV has a power supply related problem. The most common thing to go out is the circuit board that supply power to the screen. Commonly called a Backlight Inverter Board. I can't say it's 100% the problem because I can't actually look at the tv over the internet. If by chance the TV is still under warranty, go that route. If not under warranty and If you have some electronic experience, you can purchase a Service Manual over the internet and diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you circuit diagrams, test points, and part# lists. Usually, cost under $20.
A 5 blink error indicates a bad lamp driver. However a lamp may possibly cause this too. I suggest putting a new lamp in if you have one just to verify the lamp is not the problem. If it still fails with a new lamp then the lamp driver is the problem. This part should be replaced by a Sony authorized servicer. The lamp can be replaced easily by you. The lamp replacement instructions are in the TV's owners manual. Good Luck