Panasonic TH65PZ850U

[bjorkson]

Anyone encounter this problem before? When first turned on there is a black box in lower left corner, occasionally after 15-20 min the box goes away and the picture returns. The TV works perfect after that, until it is turned off for a while. Then the black box returns. You think its a bad panel or A board causing this? I know the A-board on the Panasonic Plasma TV has a high failure rate. Any thoughts?

[capkid]

Re: Panasonic TH65PZ850U

I'm not at all familiar with this issue, but it sounds like a dying panel - perhaps, similar in a way to older LGs with dying panels that have sparkles when they're cold.

[tom66]

Re: Panasonic TH65PZ850U

Since this is such a large panel, it could be that the bottom 1/3rd left and middle drivers are failing. These large panels are typically dual scanned, they have COF on top and bottom of the panel. Unlikely to be panel - more likely to be a loose connector to that portion of the COF array - on C boards.

[bjorkson]

Re: Panasonic TH65PZ850U

My first thought is that it could not be a bad panel, since it will go away once the tv is on for 15-20 mins, perhaps warming up. So, can the bad panel be rule out and just some loose connection or bad main board causing this?

[tom66]

Re: Panasonic TH65PZ850U

Yes, bad panels are very rarely temperature dependent. Probably a loose connector.