Question about Sony Grand WEGA KDF-55WF655 36" Rear Projection HDTV

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Sony Grand Wega 55" LCD ml # KDF-55WF655 goes protective shutdown

The TV is around 3 1/2 years old. When we turn the TV on the green light will flash 11 times, picture will come on and color is normal for about 45 seconds to 1 minute. Then the picture and sound go away and the green light will flash 37 times before the picture and sound come back on. This will do on for the duration the power is on. The lamp light (red) has not came on to indicate the bulb has completly gone. From reading this thread for similar problems it seems like this could be the thermal fuse or just the bulb needs replacement, but I'm not sure. Also it seems as though the fans DO NOT come on when the power is turned on ( they normally spool up loud enough to hear). I have cleaned the back of the TV for any dust that may have "clogged" the ventilation. Any help would be greatly appreciated as I would like to do this repair myself. Thanks

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  • isitthachad Dec 09, 2008

    Thanks, I'll try the replacement. So the cooling fans not running is part of the lamp going bad?

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The fans should run as the tv is trying to come on. they may click off for a minute in the reboot cycle, but should run. if they stop when the set is working, you will get a 4 red blink fan error. the fans have a feedback to let the tv know how fast they're spinning. if they're off and the tv is on, it may be cool enough to not need them yet, but typically they run all the time.

Posted on Dec 09, 2008

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This is the lamp going bad. For some reason, it doesn't spit out that lamp error, it just keeps refiring the lamp and it just cycles forever. When the lamp totally fails, you will get the lamp led lit. Replace the lamp to resolve.

Posted on Dec 07, 2008

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