TH-50PZ80U Color problem

[apo linario]

Hi,

I have color problem with this Panasonic TH-50PZ80U. Red color is drifting all over. The TV guide color has weird color too. I attached here a video of what symptoms my TV has.




By the way, I check/reseated all connectors on the A and D boards. I didn't see any loose wires or connectors. No obvious signs of burnt components either. Thank you all.

[tom66]

Re: TH-50PZ80U Color problem

This is a loose cable, you need to look closer.

There is a thin red multistranded cable that runs from the A board to the D board, and this often comes loose causing this -exact- problem.

[apo linario]

Re: TH-50PZ80U Color problem

Thank you Tom for the quick reply. I did rechexk and reseated again plug D5 to A5. That is the only plug that connect these two piggyback boards. As an added info, my tv goes reddish as soon as it is turned on. It just happened upon turning tv in the morning the other day, so sudden without any hint. I attached the cable here to confirm if this is what you're talking about. I am reading the Panasonic technical training manual and it seems it could be the D board (TNPA4439) as per described picture problems(page 52). Thanks again guys for added infos before I buy a board.

[capkid]

Re: TH-50PZ80U Color problem

That looks like the correct cable. I happen to be working on the TH-50PZ80U's cousin, the TH-C50FD18, that has a different issue. I also own a TH-50PZ80U. If you're sure the cable is seated properly, the next thing I'd try is cleaning the contacts with electronic contact cleaner; Radio Shack and most other electronic stores sell it.

Here's a similar thread for the TH-42PZ80U in which Tom pointed out the loose cable as being the issue: https://www.badcaps.net/forum/showthread.php?t=18969

[apo linario]

Re: TH-50PZ80U Color problem

Hello Gents,

I sprayed all plugs with contact cleaner and tried again. problem still the same. Any idea? Thanks.