Question about Sony KP-51WS510 51" Rear Projection HDTV-Ready Television

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Sony KP-51WS510, standby led blinks 5 times

The TV turns off itself immediately after power on (protection circuit triggered). the standby led blinks intermittently 5 times each 5s. I opened the front and and unplugged all the CRT boards (CG, CB or CR boards).
Surprisingly, when plugging either one of these boards (only one at a time) when I powered on the TV; it stays up and doesn't anymore turn off itself.
As the TV power on only with 1 CRT gun at a time, I tried to increase the screen volt with a small screw until the lines disappeared. I repeated this process with the blue, the green and the red CRT guns.
But once I plugged all 3 CRTs back up and turn the TV on, the protection circuit began back turning off the TV within 5s.

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  • mniang38 Oct 20, 2008

    Sorry to have waited that long to respond to you but I was trying some solutions that people purposed to me. However, none of them didn't work. I have changed the tripler (HV Block) and the D board and still the TV is shutting of itself 5s after power up. How can I check that 1K circuit (keep in mind the quick shutoff after 5s ) that you're talking about and how to troubleshoot the picture tube. Because, I don't know how many picture tubes have problems. Thanks for your assistance!

  • jjabool Oct 30, 2008

    I have same problem. I called sony dealer service center and paid $69 for the technition guy. He said it needs a replacment with some part that costs $370.

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It sound like you have a bad picture tube...check your 1k circuit for correct voltage and wave form.

Posted on Oct 13, 2008

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Posted on Jan 02, 2017

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