TH-42PZ80U - 10 blink

[geneg]

Guys, I know this 10 blink issue has been discussed to death but I have come across an issue causing a 10 blink I have not seen discussed before. After looking at all the posts and fixes related to the different items i.e. power board, sd card slot, main board, non of these items where causing the 10 blink issue. I verified with working boards from another fully functioning TV. The issue causing the 10 blink on this TV was the connection to the lower buffer board specifically CB1 on the C1 board. Took a lot of tests to determine this as I wanted to know what the cause was. So with the CB1 tab disconnected the picture works and just that strip from top to bottom is dark with some pixelation going on but when connected the TV instantly shuts down with the 10 blink after power on. Question is, has anyone else run into this and could it be the buffer board or the screen. I had to assemble and move the other TV on so no more good boards readily available to test with so do I purchase a new C board or chalk it up to a bad panel?

[tom66]

Re: TH-42PZ80U - 10 blink

Hmm, that is a rare one.

Shorted panels do sadly happen, but they are rare on PZ80s.

The typical fault is a 5 blink code indicating a short in 5V. However if Vda is shorted, the TV will shut down Vda+Vsus and fire an erroneous 2 blink or 10 blink code. 2 blinks is the most common though.

On the C board there are a couple of 1 ohm resistors connected in series with the Vda line to each tab driver. Check for shorts on each end of the resistors.

[R_J]

Re: TH-42PZ80U - 10 blink

I remember having a panasonic with a similar problem, I disconected each of the cables going from the panel to the c board, I found one that was bad, shorted ic on ribbon cable. whith the bad cable disconected the tv worked fine except for the black band on one side. would work in 4x3 mode as a test tv.