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KV-32HS510 and KV-27HS420, seven times blink error code shows problem in Horizontal deflection circuit.
There are many possibilities like dry solder joints, weak capacitors, Horizontal transistor short or flyback transformer fried etc.
If you have little experience of TV repair and good solder skills and have necessary tools to test / check defective parts, then you can make it. you also need to have related service manual to see board location, schematics and part numbers.
Sony error codes usually only go up to 7. If the LED blinks 11 times, this usually indicates that either the clock or data line is shorted and this needs to be serviced by someone with experience with Sony sets.