Question about Sony KP-51HW40 51" Rear Projection Television

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Green Flash and Then Nothing After 20 Seconds

My KP51HW40 TV has a bad green CRT. I have found that this CRT is no longer available from Sony. Any ideas? Has anyone experienced or received compensation from Sony for their lack of available replacement CRT's?

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Re: Green Flash and Then Nothing After 20 Seconds

I'm sure if you call an AV repair company, like Tweeter in Durham/Raleigh NC 866-689-9269, they can still access these parts. Not sure it's worth your trouble though, the individual guns are about $500 each :-(

Posted on Apr 15, 2007

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Re: Green Flash and Then Nothing After 20 Seconds

CRT nowadays have no replacements. Maybe you'll find 1 in the Philippines on surplus shops. Is a bad decision though

Posted on Apr 15, 2007

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I have a Sony KP-65XBR10W 65-inch HDTV - green flashes shut down

Most likely you have a Green CRT that is failing. Sony no longer stocks the CRT assemblies for most of the older Projection sets. Instead what is required is to send the Green CRT assembly back to Sony (minus the Delta Lens), so they can replace the Tube on the Optical Coupler. This is a major cost of about 400.00 to 500.00 for the CRT plus the the tear down and reassembly time. Then you need to do a major Convergence alignment because the other two CRTs are aligned to the Green CRT. Due to the cost and the fact that Sony will not be supporting the older sets much longer, I would not invest the money into it.
I hope this helps,

Feb 09, 2010 | Projection Televisions

2 Answers

The screen has green flash then powers it;s self off after 10 seconds

the green CRt is shorting you need to replaced it problem is the crts are no longer avail time to think about retiring that set

Dec 22, 2009 | Projection Televisions

1 Answer

Sony kp65vw700 problem with green screen and then

Most likely a shorted Green CRT of which they are no longer available.

Oct 24, 2009 | Sony KP-65WV700 65" Rear Projection HDTV

1 Answer

Kp-65w500 green flash... led blinks 8 times

I am going to guess that model number is actually KP-65ws500

This is one of group of Sony sets that had bad picture tubes---red, green, blue----the tubes are no longer available and can only be obtained by removing the bad one and sending it out for rebuild (very expensive)

There is one easy thing you may be able to do to correct this problem---It involves no replacement of parts and is just adjusting the Green screen control---usually if this is the case when set comes on background will be somewhat (in your case) green---best way to see this is turn set on and have it on a unused video input---if screen appears somewhat green and has curved retrace lines--you may be able to turn the Green screen control down and continue to use the set---set will shut down if any of the 3 picture tubes pulls too much current--ie--goes to bright green, red or blue.

Let me know if you want to know how to attempt this


Oct 03, 2009 | Sony KP-65WS500 65" Rear Projection...

1 Answer

5 flashing light code

Disconnect RED Tube CRT board if set plays without shuting off RED tube is bad or video IC on CRT is bad.

Feb 12, 2009 | Sony KP-51HW40 51" Rear Projection...

4 Answers

Green flashes then tv turns off

or a new lamp. you could first replace the lamp.
the screen might work fine for a couple of seconds, but then it fades away or deteriorates. This means the lamp is going bad.

Aug 23, 2008 | Sony KP-51HW40 51" Rear Projection...

2 Answers

Sony KP-57WS500

· Sony Picture tube recall
· Which models are affected with the "flicker" problem?
A1: There are 12 models in total: KDP57XBR2, KDP65XBR2, KP46WT500, KP51HW40, KP51WS500, KP57HW40, KP57WS500, KP57WV600, KP57WV700, KP65WS500, KP65WV600 and KP65WV700.

Feb 11, 2008 | Sony KP-57WS500 57" Rear Projection...

1 Answer

Red and green colors not coming through in picture

Bad crt

Sony Picture tube recall
Which models are affected with the "flicker" problem?
A1: There are 12 models in total: KDP57XBR2, KDP65XBR2, KP46WT500, KP51HW40, KP51WS500, KP57HW40, KP57WS500, KP57WV600, KP57WV700, KP65WS500, KP65WV600 and KP65WV700

Feb 04, 2008 | Sony KP-51WS510 51" Rear Projection...

4 Answers

Green Flash

I had the same problem with my SONY KP51HW40. The problem started about a year and a half ago, image turning greenish, then back to normal. Then started getting worse, with the image turning greenish or reddish, and then flashing green once and continue operating normal. And finally, it got really bad with the set shutting off after flashing green several times. It would not operate for more than five minutes at a time, before shutting itself off. So my problem got to the point of needed attention and here's how my TV got fixed. I downloaded the service manual. After the TV was shutting itself off, it displayed an error code using the POWER/STANDBY LED. My TV set STANDBY LED was flasing 8 times, and according to the service manual, this means that the T8005 transformer was bad. This is the high voltage transformer that feeds all three CRTs. The solution was to replace the transformer, but I am not really good at soldering so I decided to replace the entire D-Board, which is where the T8005 transformer resides. This transformer is also called the flyback transformer. So I ordered the new board and replaced it myself. This is the high voltage (30,000 Volts) transformer, the CRTs can hold electrical voltage for a long time. If you are not familiar with TV repairing, you can be seriously or fataly injured. That is my disclaimer. After replacing the D-Board, the problem was not solved. Obviously, the SONY diagnostics circuitry read low voltage out of the transformer and assumes the transformer went bad, but they don't tell you what else could be the problem. If the transformer voltage drops, it could be because of not enough current coming into the transformer or a short in a circuit at the output of the transformer. Then thinking, if I had green flashes (not red or blue flashes), it was clear the green CRT was the culprit. I unplugged the TV set, a couple of days later I started checking connectors and noticed the CG board (the board at the end of the Green CRT; the Green CRT is the middle CRT) was a bit loose compared to the Red or Blue CRT boards. So I pulled the board out (pull down while jiggling, no latches). Clean it well. Then I slightly bent the CRT pins, very carefully, very slightly, outwards (away from the center core). I re-inserted the board and this time, it was much tighter, and the pins were making better contact with the CG-board socket. Turn the TV on, and problem solved. No more green flashes, no more TV shutoffs. The SONY service manual did not do me any favors with the diagnostics. It should've listed all possible problems, including faulty transformer, short on CRT, bad connections, cracked cold soldering, etc. Lesson learned, and now I ended up with a spare D-board because SONY parts sales are always final. No refunds.

Jun 24, 2006 | Sony KP-51HW40 51" Rear Projection...

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