Lg 60pg60fua occasional black horizontal line

[braxton]

I picked up this 2008 60" plasma. It has an occasional black horizontal line that briefly appears on the top half of the screen and then goes away. I pulled off the back and found that when I gently press on one of the heatsinks on the upper Y buffer board i can make the black bar appear. If I either press down gently or lift up gently on the heatsink, the black bar appears. When I release, the black bar goes away.

So I have a bad connection or short on one of the chips on the upper buffer board I suspect. It is very hard to find this part online, especially since I am from Canada.

Could a heatgun repair this? Oven reflow? Any suggestions?
Thanks.

[ReeceyBurger123]

Re: Lg 60pg60fua occasional black horizontal line

Reseat buffer connections going to the PDP.

[braxton]

Re: Lg 60pg60fua occasional black horizontal line

Reseat buffer connections going to the PDP.

I did try re-seating all ribbon cables and the connectors to the YSUS main but no change. Maybe I will clean the connections with isopropyl alcohol and try again. Pressing on the middle IC chips reproducibly cause the black bar to appear so I think it is a chip connection issue. I might need to remove the thick glue strip holding the chip/heatsink assembly in place -for a closer look...

[braxton]

Re: Lg 60pg60fua occasional black horizontal line

Oven reflow seems to have done the trick, time to put it through its paces...

[braxton]

Re: Lg 60pg60fua occasional black horizontal line

Worked fine for about 4 hours and then horizontal strip started acted up again due to heat.
The heatsink over the chips is sealed by a rubbery compound that I'm not sure how to remove.
Also seems next to impossible to find an upper buffer board for sale.
Does anyone have a spare part EBR38574601???