PN64D8000 and Devilish Child

[mmartell]

Well I don't know if the child is devilish but he apparently threw one of his toys at the screen resulting in the provided image below.

It looks like the scan ic's are not operating for that portion of the screen yet the image is not black there.

I was wondering if it was possible to deactivate a scan line or two after restoring functionality to that part of the screen. Seems like a shame to gut it if it can be mostly repaired. Make a nice garage tv

[tom66]

Re: PN64D8000 and Devilish Child

It's caused a micro fracture which has fried one of the buffer ICs.
If you deactivate an IC, you will get a black bar in place of the white bar.
You will still have the black spot no matter what you do.

[mmartell]

Re: PN64D8000 and Devilish Child

I mean to replace the ic(s) and deactivate the line(s) that drive the fracture so the rest of the pic returns.

[Glitcher]

Re: PN64D8000 and Devilish Child

oh you mean you want to turn off that horizontal line which has the fracture so it won't effect the rest of the IC itself? Interesting idea, not sure if it is possible or not. I know that each pin on the IC will drive one line on the panel, if you can find which pin corresponds with the fracture and remove it? Don't know if it'll work like that or not.

I guess it'll depend on how big the fracture itself is. Whether its a small pin hole or a bigger crack?

[mmartell]

Re: PN64D8000 and Devilish Child

oh you mean you want to turn off that horizontal line which has the fracture so it won't effect the rest of the IC itself? Interesting idea, not sure if it is possible or not. I know that each pin on the IC will drive one line on the panel, if you can find which pin corresponds with the fracture and remove it? Don't know if it'll work like that or not.

Yes, exactly what I'm trying to ascertain.

[tom66]

Re: PN64D8000 and Devilish Child

Not going to work - as we have found with modern buffers open lines will fry a buffer IC as much as shorts (I am not sure why)
Still going to have that spot on the screen which will probably only grow...

[mmartell]

Re: PN64D8000 and Devilish Child

Interesting. I would have though that the line being translucent meant the buffer ic was still active just messed up in another way.

Btw just so I'm clear the black spot was photoshopped on after to show the location of the strike.

[mmartell]

Re: PN64D8000 and Devilish Child

According to SM for the hp-t5054 shorted buffer ic lines cause a translucent rendering where n/c cause a line to be drawn black. I know it's a different panel. [CONJECTURE]Maybe the modern failure is that a shorted line shorts all lines together causing translucence ? [/CONJECTURE]

[tom66]

Re: PN64D8000 and Devilish Child

Btw just so I'm clear the black spot was photoshopped on after to show the location of the strike.

How sure are you? Not questioning your logic here, but I've seen exactly that with some panels when cracked - egg like distortion with some dead lines.


Pioneer 9G Kuro 50"

[mmartell]

Re: PN64D8000 and Devilish Child

On reflection you absolutely could be right about the circle. Have not seen it first hand and sometimes communications are not the best. Thanks for the heads up.

[mmartell]

Re: PN64D8000 and Devilish Child

As it turns out tom and after further conversation with the seller you are correct about the black spot.

As I am not in need of parts from this unit I will leave it alone.

Thanks for your counsel.