Question about Sony KP-51WS520 51" Rear Projection HDTV-Ready Television

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My SONY TV (KP-51WS520) will not turn on...

I have SONY (KP-51WS520) which will not turn on. The STAND BY/ TIMMER lamp flashes 9 times. According to the serivce manual, diagnostic item is zero crossing detector.Probable cause:D6116 or D6301 is open (G Board). How can I correct this problem????? What do they mean by
Please help!
Thank you,

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A Diode allows electricity to flow in one direction and blocks it in the other direction. So when its open means its burnt out and nothing can pass through in any direction. they will need to be replaced.

Posted on Apr 24, 2008


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My sony KP-51WS520 will not turn, the stand by light blinks 9 times when the power button is pressed, unplug for a short while the same, unplug overnight same problem, I had the TV since 2005

acorinding to my case histories at the shop this is caused by a faulty G cuircit board. we repaced and this fix it. i dont know if you can get this board.

Nov 04, 2010 | Sony KP-51WS520 51" Rear Projection...

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I have a Sony KP-51ws520. I cannot power on. says stand bye and blinks 9 times.PLEASE HELP it is only 5 years old and they says some of the parts are no longer available.

Those LED flashs are a fault indicator...First thing to do is to try a reset:

With the TV plugged in push and hold down the reset button on your remote then press the power button on the the TV and then release the reset button once the screen has come up.

9 blinks means, "Zero Crossing Detector" and the probable cause locations listed are "D6166 or D6114 is open

If you are handy you can replace D6301 diode and it fixed the problem. You can buy that diode at for $3. good luck

If still no luck then this is going to require a serviceman.

Jan 28, 2010 | Sony KP-51WS520 51" Rear Projection...

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Diodes are blown on the G board (Power) which triggers the zero cross error. replace the G board or have yours rebuilt.

Nov 28, 2009 | Sony KP-51WS520 51" Rear Projection...

2 Answers

Sony Wega Model #KP51WS520

Press in order on the SONY remote "display - 5 - vol. down - power" .that will show diagnostics indicating 9 Zero Cross Detect . You shoud take it to a servicer.

Oct 18, 2009 | Sony KP-51WS520 51" Rear Projection...

1 Answer

How TV's stand by button is flashing 9 times, what

Sounds like one of these Codes for television repair.

Check out the link above, it may be a bulb needed for your DLP television.

Sep 10, 2009 | Sony KP-51WS520 51" Rear Projection...

1 Answer

TV standby flashes 10 times first, then 9 times

I believe you have a "G" Board failure. If I am thinking correctly, when you open the lower cabinet back, you will see a smaller Board that the AC Cord plugs onto. Their is not a lot of components on it but it will cause this same symptom. This Board according to Sony at last inquiring is not available but they will refurbish it if you send it to them. The best way to do it is to work with a Sony Service Facility, have them come out and confirm it is bad, then they could send it in and reinstall it when it gets returned. ETA on something like this is 3-4 weeks.
I hope this helps,

Jul 23, 2009 | Sony KP-51WS520 51" Rear Projection...

1 Answer

I have a sony projection tv model #KP-51WS520. The tv won't turn

On the remote, hold down the reset button, press power button on the tv set, release the reset button on remote control. This is a factory reset> If TV does not recover from this call 1-800 222-sony for repair options. Good luck

Jul 07, 2009 | Sony KP-51WS520 51" Rear Projection...

1 Answer

Sony KP-51WS520 , lamp flashes 9 times but TV will not turn on.

open means they have to be replaced they are no longer good and chassis is what the tv is inside (its the electronics works)

Apr 14, 2008 | Sony KP-51WS520 51" Rear Projection...

1 Answer

Sony KP-51WS520 Stand by flashes 5 times

When a Sony TV flashes five times, that means that there is an AKB circuit fault.
This means that there is something wrong with the video.
When you get this error, several IC and components concerning the video signal must be tested and eventually replaced.

Mar 13, 2008 | Sony KP-51WS520 51" Rear Projection...

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