Panasonic Plasma TV with flickering screen

[JimmyG]

Re: Panasonic Plasma TV with flickering screen

Zach- I appreciate your help on this. Both of these links will help. Hopefully I will get my SU card today and get it installed. I will keep you updated on my progress. Thanks again.

[JimmyG]

Re: Panasonic Plasma TV with flickering screen

I have installed my new SU card. However, I have these little black horizontal lines going accross the top of my screen. I can tweak the ribbon cables and some of the lines go away, but not totally. Should I get some type of cleaner or emory cloth for my ribbon cables?

[zacheriaj]

Re: Panasonic Plasma TV with flickering screen

Try to just remove and replace the ribbons on the top of the board. Otherwise isopropyl alcohol and a q tip will work fine

[tom66]

Re: Panasonic Plasma TV with flickering screen

I have installed my new SU card. However, I have these little black horizontal lines going accross the top of my screen. I can tweak the ribbon cables and some of the lines go away, but not totally. Should I get some type of cleaner or emory cloth for my ribbon cables?

This is quite a common issue after installing the ribbons. You will have to undo the cables and reinstall them. But when you reinstall them,
make sure to press them in slightly until you hear or feel a slight "click". Also make sure the ribbon is aligned perfectly parallel.

Only ever adjust them with the power off (unplugged!)

Cleaning is rarely necessary but as zach suggests isopropyl alcohol (99% or above) can be used...

[JimmyG]

Re: Panasonic Plasma TV with flickering screen

Zach - after I installed my new SU card, I had these little black horizontal lines going across the top portion of my Plasma screen. I say little, but some of them were 2" tall. I could tweak the ribbon cable a little bit and most of them would go away, but not all. I never could get them to all go away. Do I need to look at cleaning the ribbon contacts, and maybe taking a can of air and blowing out the ribbon jack. What is the best way to do this?

[JimmyG]

Re: Panasonic Plasma TV with flickering screen

I guess by remove and replace , you are referring to receding the ribbon cable connections? If so, I have done tried that several times. I picked up some Electronic Cleaner at the local electronics store. However, I am not sure if it is a good idea to spray this cleaner on this ribbon cable or not. What about the emory cloth, is that a good or bad idea?

[JimmyG]

Re: Panasonic Plasma TV with flickering screen

Thanks Tom. I will try that. I feel like I am putting the ribbon cable in far enough, but I have never heard or felt a click.

[JimmyG]

Re: Panasonic Plasma TV with flickering screen

!!Repaired!! - good news. The SU card was the culprit of my flickering screen. I had a little trouble getting the horizontal black lines to go away, but finally got the ribbon cables seated correctly and now everything looks good. Thank you Zacheriaj , LTank, Tom66, & edevans122. I could not have repaired this without your help.

[zacheriaj]

Re: Panasonic Plasma TV with flickering screen

Good job!! Keep looking for other TVs to tinker with. It is a super fun learning adventure.

[tom66]

Re: Panasonic Plasma TV with flickering screen

Nice fix... these are good TVs.

[JimmyG]

Re: Panasonic Plasma TV with flickering screen

I agree - It was fun and a nice fix. I was like a little kid waiting for a toy to come in the mail. Once I got the SU card , I was so excited about getting it installed . The whole process was enjoyable. Thanks again for your help.
......... I have a old Samsung Rear-projection TV (Model HCN653W) out in my shop that I am thinking about working on. This is a 65" high definition TV that is probably at least 10 years old. It actually still works, except I have a convergence problem with it. The people or objects on the TV screen have a red or light blue ghost image on each of them. Is this a card that can be changed out?

[Dennis461]

Re: Panasonic Plasma TV with flickering screen

I am bringing this thread back to life, apologies to the Zombie Apocalypse mutants.
This thread sound like my problems, Panasonic tc-p55gt31.

Around 5 years old, flickering (screen reflash?) on top half with TV cold or hot.
I can minimize it by lowering brightness and contrast .

The SU board may or may not be the problem, along with the flickering, I see images from the last channel I was watching.
I tried the scrolling white/black bar for 15 minutes with no change.

I also have the 13 dashed line in the top 4" of screen occasionaly.

Behavior exists with, cable, antenna HDMI, and menus.

Who repairs these TV's in New Jersey?