Re: Help Reparing Panasonic TC-P55GT50 7 blinking lights, Narrowed down to SU or SD




Hey tw2005

Those bolts were back in when I tested it after replacing the SC and SD SU boards. Its highly likely i was sold a bad SD or SU board is my guess. Thanks for reminding me to check the simple things. I think in the long run I am just going to return the boards I was given and maybe sell off the parts. I'm a bit sad to see the plasma go as it definitely has a superior picture over LED LCD, but I am not so sure I want to try and buy some brand new SU and SD...

Re: Help Reparing Panasonic TC-P55GT50 7 blinking lights, Narrowed down to SU or SD



Definitely great advice. This was my first TV repair. I took electronics apart and did quite a bit of soldering as a kid, and I build my own computers. I should have known better to test them, but as far as I can tell there is nothing wrong w/ the used boards themselves. I just didn't have the experience to test them before putting them in and thought that vendors would be reliable. Very naive of me. I ran a multimeter from the ground screws to the output ribbon cable attachments...

Re: Help Reparing Panasonic TC-P55GT50 7 blinking lights, Narrowed down to SU or SD

So, I took a look and was able to isolate shorts at pins SU41 pin6 and SD42 pin 2 (labeled vscan in the repair manual) when connected to the SC board, but when not connected to the SC board I cant find any shorts on the SU and SD boards themselves. I completely isolated the SU and SD and jumped sc50 and then powered the TV up with just the SC and everything else connected, and the TV did power up with green lights on the SC and SS boards. This leads me to believe that the SC is good. I definitely...

Re: Help Reparing Panasonic TC-P55GT50 7 blinking lights, Narrowed down to SU or SD

The boards I purchased ran about $35 a piece, my guess is that they were used. I think i may try and get my hands on some new ones even though they are much pricier at $150 and $200 a piece, still cheaper than buying a new tv I guess.

Re: Help Reparing Panasonic TC-P55GT50 7 blinking lights, Narrowed down to SU or SD

I did an initial check for shorts on the new boards by checking for continuity to ground from all pins on the ribbon cable connector, and that was clear. Are there other shorts I should look for on these "new" boards? I ordered the SD and SU from shopjimmy, and I beleive they are brand new boards. I ordered the SC boards from sears parts, as it was out of stock at shopjimmy. Thanks for the quick reply! The other thing I am noticing, is some caps that seem to be bulging a bit on the power...

Hello,

I have been trying to repair my Panasonic TC-P55GT50 after it just decided to up and fail while in use. I got the classic 7 blinking lights, purchased a new Y-Sustain and Y-buffer boards (SC, SD, and SU board) and replaced them only to get the 7 blinking lights again. I tried to troubleshoot further and I disconnected my new SD and SU boards from the SC boards and then connected a jumper SC50, and the panel turned on, but gives a garbled picture. I am not really sure what to expect here, and not sure if there is an issue with these new SD and SU boards or the plasma panel itself....

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Hello,

I am currently in the process of repairing a Panasonic Plasma TC-P55GT50, and have replaced the SU,SD, and SC boards, but still get the 7 blinking lights, looking to read more up on this and see if I can figure it out to rescue my TV.