Question about Sony Grand WEGA KF50WE620 Television

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Red light bkinks, screen goes black for few seconds , picture comes back and then repeats

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You have either a defective ballast or a defective lamp. The lamp is the most likely and is user replaceable. If your ballast is defective you will need to contact a service person

Posted on Nov 08, 2010

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Posted on Jan 02, 2017

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My AOC screen goes black after about a few seconds after booting.


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Picture & sound go on & off every sec, red light blinks 5 times


helloFive blinks - AKB circuit (automatic kine bias), the timer/standby indicator blinks for about 30 seconds then goes to the self-diagnosis function. Something is wrong with the video. Check video out, Q705, 732, 761 and other components on the C board, also check Q218, 219, 220 on the A board. In addition, unit could be in IK blanking, try turning up screen slightly.

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1 Answer

I have a similar problem with the Sony 60" wega SXRD rear projection TV. The green light blinks on the power/display LED and the picture comes on for a few seconds and then the screen goes black . Then the...


I believe 4 blinks is fan error. You can take back off and watch fans in particular the fan for the lamp (this one goes out the most) The TV has a sensor so it knows if the fan turns.You can take a pencil and use it to spin fan sometimes that will jump start it (not a permanent fix just a test). You can try cleaning dust off fan and replugging the connector on the wires coming from fan.Might fix it if not fan will need replacement.

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Tv tunrns on then goes to stand by flashes 4 times & repeats


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This should be a quick fix. Try resoldering the vertical IC. This is a small flat IC attached to a heat sink with about 11 pins. It should be marked LA7837 or something similar. That should resolve the problem.

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My Sony comes on then both sound and picture goes black.


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1 Answer

When i take a picture with flash, the screen goes black and a red light flashes


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TV Picture Goes Black


I had the same exact problem.
I removed the bulb and cleaned it. There is a small screen at the top of the bulb and it was covered with dust. Once it was cleaned I replaced the bulb and it solved the problem.
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