Question about Sony KV-27S42 27" TV

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KV27S42 problem my email is kevinkcam AT msn DOT com. KV27S42 Problem. I have no picture and 2 flashed of the red light at 3 second intervals. I powered it on using the Ke combination DISPLAY | 5 | VOL UP | POWER It will stay on but with no picture and the blinking code. What is that code? Thanks, Kevin

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  • kevinkcam Aug 01, 2008

    Dan,

    The number is C5426 with a smaller OL4 elsewhere on the transistor.

    It does not have any discoloration or is mot misshapen although that heatsink is cold to the tough.

    What is the next most common failure after this?

    Thanks for your time.

    Kevin

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Hi Dan, my Sony doesn't blink or doing anything when I plug it to the wall, I remove the C5426 which I think it is 2SC5426. What is the number should I get when I use a ohm meter to measure either leg? When the transistor was on the board, I got about 69 volts from most of the ground and about 60 volts from some of the positive component. What do you think?

Posted on Oct 21, 2008

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The 2 blinks is an indication of overcurrent. That translates into a short somwhere inside the set. since you can get sound but no picture, that suggests that the problem is in the high voltage section. The most common failure there is the Horizontal Output Transistor. This is a 3 legged part attached to a heatsink close to the flyback transformer (part with large red wire coming out the top). That part should be marked C5438 or something similar. Post the marking here and I'll give you the complete part number.

Dan

Posted on Aug 01, 2008

  • ABRsvcs Aug 01, 2008

    You won't see the problem. If you have an ohmmeter, with the transistor removed, measure between the center leg and either outer leg. I suspect that you will read zero(0). If so, replace it. The full part number is 2SC5426.



    Dan

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