Panasonic Plasma TC-P50S30 Viera 2011 with vertical lines

[jmm1952]

I just picked up a dead (no standby light) Panasonic and opened it up. Discovered that the power board had 2 blown fuses (radial through-hole). Replaced the fuses and still no standby light but had standby power. Powered it up and WOW what a picture. I had a Roku hooked to one of the HDMI inputs. However, it had horizontal black bars and one area (maybe 1 inch wide of vertical bars (red, green, blue) which went down 3/4 of the screen. I took care of the horizontal bars, but I am perplexed about the vertical bars. Still no standby light. I have little experience with plasma. Just finished repair of a 42" Maxent and learned a lot. I included pictures and would appreciate any help, suggestions on troubleshooting. I am thinking that it maybe the main, buffer boards, cable, or even the panel (heaven help). Pictures attached. Thanks in advance.

[newtothis]

Re: Panasonic Plasma TC-P50S30 Viera 2011 with vertical lines

Panel fault I am sorry to say

[jmm1952]

Re: Panasonic Plasma TC-P50S30 Viera 2011 with vertical lines

Thanks "newtothis". Is there anyway to verify a bad panel...or is this just a symptom? What would cause a bad panel with these symptoms? Would it be bad components, process, or is this something that is indicative of Panasonic panels?

[tom66]

Re: Panasonic Plasma TC-P50S30 Viera 2011 with vertical lines

This is a symptom of a panel failure. It's very rare on Panasonic sets, but it does happen. It's usually due to random failure in the address driver ICs which run quite hot and are very small. They deal with 55VDC and over 384 channels, so they are extremely dense.

Any dust/dirt/particles that get trapped during manufacture may lead to a short between channels, causing damage to the IC. Since the TCP module (chip + flatflex) is bonded to the plasma glass, it's not replaceable.

This fault is much more common on LCD TVs than plasmas, but it does still occasionally happen on plasmas.

P.S. It looks like there is a small crack on the panel so this could have shorted the address electrode lines causing the failure. It is very rare for cracks to allow the TV to work at all. Usually the gas leaks, or the Y-electrodes short causing a 6/7 shut down code.

Regardless, turn off the set now, and take out the SC board and buffers. Both are guaranteed working. You can probably sell them for quite a bit as they are a frequent failure. The A board is also worth a few bucks. The rest is not worth as much, but worth listing on eBay/craigslist/etc.

[tw2005]

Re: Panasonic Plasma TC-P50S30 Viera 2011 with vertical lines

most likely panel, could try a reseat of the bottom ribbon that lines up with that section or replacing c board but i would not expect c board to be the issue. Don't run the Tv without the heatsink on the cable mounted if you have a fiddle. That's all you can try but I've had that on a 2008 model and it was the panel. the bottom ribbon had ICs embedded and they can fail so not repairable. the boards in this are probably worth more than sell the Tv whole particularly the SC.sd,su boards and A board that are of value.

[tw2005]

Re: Panasonic Plasma TC-P50S30 Viera 2011 with vertical lines

This is a symptom of a panel failure. It's very rare on Panasonic sets, but it does happen. It's usually due to random failure in the address driver ICs which run quite hot and are very small. They deal with 55VDC and over 384 channels, so they are extremely dense.

Any dust/dirt/particles that get trapped during manufacture may lead to a short between channels, causing damage to the IC. Since the TCP module (chip + flatflex) is bonded to the plasma glass, it's not replaceable.

This fault is much more common on LCD TVs than plasmas, but it does still occasionally happen on plasmas.

P.S. It looks like there is a small crack on the panel so this could have shorted the address electrode lines causing the failure. It is very rare for cracks to allow the TV to work at all. Usually the gas leaks, or the Y-electrodes short causing a 6/7 shut down code.

Regardless, turn off the set now, and take out the SC board and buffers. Both are guaranteed working. You can probably sell them for quite a bit as they are a frequent failure. The A board is also worth a few bucks. The rest is not worth as much, but worth listing on eBay/craigslist/etc.

beat me to it, great minds think...........

[jmm1952]

Re: Panasonic Plasma TC-P50S30 Viera 2011 with vertical lines

Thanks tom66 and tw0025 looks like I am going to part it out on ebay. Got my anti-static bags ready. Thanks for your help. May try to reseat the ribbon at the bottom...just to give it a try. Great information here...Thanks again.