Please help, is my Panasonic plasma ZT65 dead?

[HumanTT]

I'm needing some help. I have had my TV for over 6 years and lot of hours, like so many hours I would be scared to check lol. When I went to turn it on last night, it had a huge black spot on it, it reminds me of a cracked screen. Yesterday I did have a house full of kids so it is possible something/someone hit it. I could tell with the TV on for 30mins or so the spot was growing. This morning around 8hrs later the TV is 100% black, with the TV on or off brightness does not change, it looks as if it has no power.


What I do know
1- When it is off or on I see no cracks (I also don't see any leaking like you would on a LCD cracked screen, but I'm not even sure if a Plasma would do that.)

2-It is growing, the black spot is getting bigger, I think if i would leave the TV on for a hour or so the whole screen would be black.

3-All inputs have the issue.

4- Where I can see a picture at, it is really snowy.

5- I do see pixel jumping around the outer edge of the black spot, and in the center of it every now and then I do see pixels jumping around.



(8hr later update )
1-TV is now 100% black, no change in brightens when off or on.
2-I see no pixels jumping around.


Please tell me this is not my panel, and one of the boards.

[tvtimmy]

Re: Please help, is my Panasonic plasma ZT65 dead?

What is the full model number?

[HumanTT]

Re: Please help, is my Panasonic plasma ZT65 dead?

What is the full model number?

Sorry for not including that, it is a TC-P65ZT60

[HumanTT]

Re: Please help, is my Panasonic plasma ZT65 dead?

On some of the threads people ask for pictures of the boards. So I went ahead and got some.

[mmartell]

Re: Please help, is my Panasonic plasma ZT65 dead?

Probably the zsus or whatever Panny calls it. Board on the right - check if there are any fuses on it and see if they're blown.

And blow that thing out it's filthy. And don't forget to clean the fans.

[HumanTT]

Re: Please help, is my Panasonic plasma ZT65 dead?

Probably the zsus or whatever Panny calls it. Board on the right - check if there are any fuses on it and see if they're blown.

And blow that thing out it's filthy. And don't forget to clean the fans.

Thats 6 years of hanging on the dust lol.

I did look at all the boards on the right, none of them have any fuses. only boards I see that do are the two center ones, and all of them are good.

Anyone know where I could find a service manual for it? I found one for the 60" TC-P60ZT60, but not the 65" TC-P65ZT60?

[diif]

Re: Please help, is my Panasonic plasma ZT65 dead?

Here you go.

[R_J]

Re: Please help, is my Panasonic plasma ZT65 dead?

I would be leaning toward a panel problem, SS, SC, buffer boards would likely cause a line or bar from left to right (edge to edge) also a fault with the C1,C2 boards (at the bottom of the panel) would cause a line or bar going top to bottom. This looks like the panel has a leak (center bottom) and there is very little gas left in the panel.
It does'nt need to be a crack but the panel seal is leaking in that area. Stand the tv on its side or upside down and I suspect the black area will change.

[HumanTT]

Re: Please help, is my Panasonic plasma ZT65 dead?

I would be leaning toward a panel problem, SS, SC, buffer boards would likely cause a line or bar from left to right (edge to edge) also a fault with the C1,C2 boards (at the bottom of the panel) would cause a line or bar going top to bottom. This looks like the panel has a leak (center bottom) and there is very little gas left in the panel.
It does'nt need to be a crack but the panel seal is leaking in that area. Stand the tv on its side or upside down and I suspect the black area will change.

I would of never thought about that. The next morning I went to turn it on and it's 100% black now, so I would be unable to perform your test.

Is there a way to test if the panel is indeed getting the correct voltage? Cause if the panel is getting the correct voltage, and it's not lighting up at all just staying black, and with it not blinking any error codes, the would rule out anything but the panel itself correct?

I just don't want to give up on it till I'm just about 100% sure it is the panel.

[R_J]

Re: Please help, is my Panasonic plasma ZT65 dead?

I have notice that some panels that have lost there gas, seem to make a growling type noise that comes from the panel, this noise will usually change as the video signal changes. There will not be a blink code for this problem as the tv thinks everything is working.

[HumanTT]

Re: Please help, is my Panasonic plasma ZT65 dead?

I have notice that some panels that have lost there gas, seem to make a growling type noise that comes from the panel, this noise will usually change as the video signal changes. There will not be a blink code for this problem as the tv thinks everything is working.

No sound what so ever, just a click when I power it on.

Since everyone thinks it is the panel, I have just placed an order for some static free bags once they come in I will start the process of saving the circuit boards.

[linksys1127]

Re: Please help, is my Panasonic plasma ZT65 dead?

Make sure the tv is unplugged and has been powered off for at least 10 minutes. With a meter check the resistance both directions between the two pins that are circled white in the pictures with the plug unplugged from the board and report back on your findings. If you don't have a multimeter you can get a cheap one for around 10 dollars at Walmart or a hardware store that will work. Don't give up yet!

[linksys1127]

Re: Please help, is my Panasonic plasma ZT65 dead?

Here’s a link to a video on how to test a Panasonic board at the connector. It’s at the very beginning of the video. The rest of the video is the repair of the board. It’s a different board than yours but it gives you the idea. He’s testing in the diode mode instead of checking resistance and listening for a beep. Some of the inexpensive meters don’t have this function so checking resistance works on all meters. He checked it one direction. Check it both directions and report back. Take a picture of your meter and what selection you have it on while testing so we know you have it setup correct.

https://youtu.be/fzohAHhTUzA

[HumanTT]

Re: Please help, is my Panasonic plasma ZT65 dead?

Make sure the tv is unplugged and has been powered off for at least 10 minutes. With a meter check the resistance both directions between the two pins that are circled white in the pictures with the plug unplugged from the board and report back on your findings. If you don't have a multimeter you can get a cheap one for around 10 dollars at Walmart or a hardware store that will work. Don't give up yet!

Make sure the tv is unplugged and has been powered off for at least 10 minutes. With a meter check the resistance both directions between the two pins that are circled white in the pictures with the plug unplugged from the board and report back on your findings. If you don't have a multimeter you can get a cheap one for around 10 dollars at Walmart or a hardware store that will work. Don't give up yet!

I did already pull everything off/out, but it can always go back together. Thanks for giving me something else to check out, any help is always appreciated especially before I recycle the panel. My multimeter has a few settings for ohms, I'm not for sure what setting I need it to be on, but I'm going to give this a shot.

board on the left side
Continuity- NO (No sound is made)
resistance on 2k -.958 (I only get that reading one way, if I swap the probes around on the prongs on the board I get nothing)

Center top board
Continuity- NO (No sound is made)
resistance on 20k - 15.09 (I only get that reading one way, if I swap the probes around on the prongs on the board I get nothing)

[R_J]

Re: Please help, is my Panasonic plasma ZT65 dead?

Since you have the tv apart you could have a close look at the glass panel, you might be able to see a crack, it might be hard to see but that would confirm the problem.

[HumanTT]

Re: Please help, is my Panasonic plasma ZT65 dead?

Since you have the tv apart you could have a close look at the glass panel, you might be able to see a crack, it might be hard to see but that would confirm the problem.

Good call, but I still don't see anything. If it is a crack it has to be behind both front panels of glass. I even moved the panel in front of 3 big windows we have thinking maybe sunlight would help, but still nothing.

[R_J]

Re: Please help, is my Panasonic plasma ZT65 dead?

What do you mean by both front panels of glass?

[linksys1127]

Re: Please help, is my Panasonic plasma ZT65 dead?

Looks like your SC board or the board on the left is bad. 900 ohms is way too low. You’ll probably find some of the ICs mounted to the heatsinks shorted. You can also check the SD and SU boards for shorted buffer ICs. Those are the boards that are mounted between the flat ribbons that go to the panel and the left board. Here’s a link to a video on how to do that.
https://youtu.be/-JVLWpcIxJQ

[R_J]

Re: Please help, is my Panasonic plasma ZT65 dead?

There is no way a bad SC board, SS board or buffer board would cause the image in post #1

[HumanTT]

Re: Please help, is my Panasonic plasma ZT65 dead?

What do you mean by both front panels of glass?

I believe a plasmas has 3 sheets of glass, but I could be wrong. The front glass that you can touch has a IR filter on it, and then you have two sheets of glass that have the gas in-between them that is sealed. I don't believe you can see the back glass.


Edit

https://video.nationalgeographic.com...c-7b3d9d680000

https://www.youtube.com/watch?v=YlS24yOZZSk