I have a Panasonic TH-C50FD18 plasma TV that has no picture. We had a severe electrical storm two nights ago and the TV wouldn't work the next morning. The red light comes on steadily, with no blinking, when I turn the set on. I assumed it was the power supply, so I downloaded the service manual and took the back panel off so I could do some testing. I found five fuses and all tested good. Two of the circuit boards have green LEDs that light up. There is a small bulb on the AC power board, but it does not light up. The manual seemed to indicate that the problem might be in the board that actually controls the plasma display.I've found sources for all of the circuit boards at reasonable prices. Can this set be fixed at a reasonable price, or should I just view it as an opportunity to upgrade.Another odd thing that may or may not apply. There was one lightning strike that was was extremely loud and close, and it was accompanied by a sound like shattering glass. Is it possible for a severe surge to actually damage the internal glass of a plasma screen? I can't see any problems.
Thank you for posting your question on Just Answer! I will be happy to help you with this problem. Can you please give us some more information so I can better answer your questions.
-If you look close at the screen in a dark room, when on, is the screen slightly illuminated? -How old is the unit?
I turned out all of the lights and then turned the TV on. The screen is slightly illuminated.
I purchased it a little more than three years ago.
Ok this is very common in your model after a storm. What you have is a bad A board. You need to replace part number TNPH0721AHS. Tim
I'm having trouble locating this board. The only one I've been able to find so far is from a seller who doesn't allow returns, so I'm a little reluctant to spend $150 with no possiblitiy of return. How confident are you that this will solve my poblem.
I am 100% sure you need that board...howveer with storm damage we cannot rule out that a second board wont be bad too.Tim
I found a board at a reasonable price from a very highly rated seller. I plan to install it as soon as it is delivered, hopefully before the weekend. If I still have problems, will I be able to ask additional questions about this issue if I accept your answer now and release the payment?
Yes, even if you accept the answer you can still come back to me anytime on this question page without paying agian.
Let me know how it goes when you get the new board.
Factory trained TV repair technician. U.S. NAVY trained.
Tim,The board arrived yesterday and I installed it. The TV works now, but I could not get the HDMI input to work. Eventually, I determined that the HDMI output from the cable box wasn't working. I'm guessing that's where the initial power surge came from and it destroyed both the A board and the HDMI output on the cable box.
Yes thats pretty common, normally the board gets surged through the box...about 50% of the time the box is bad too.Tim
I've had a problem with a TH-42PX25 and it was assigned to someone else when I sent the question to JustAnswer. That individual recommended replacement of the H board, and it seemed reasonable given the symptoms that I had. That didn't work, and I have been waiting at least eight hours for a response. If you think you can help, I'm willing to initiate a new request with you. Here are my symptoms.
My son was using the TV and they unplugged it and moved it when they were painting the room. He said that it wouldn't work when they reconnected it after finishing the painting. I've tried hooking it up via component, hdmi, direct to my cable, and all three composite inputs. The only input that works fully is the PC input through the 15 pin VGA plug. I couldn't get any response from the SD slot when I put a card in. I got an unusual response when I connected the cable directly to the Antenna A input. I don't get any of my cable channels, but it does find about three or four channels that appear to be digital OTA channels. I think they are Channel 0, Channel 20-1, 70-141, and 70-143. I think it may be using the cable like a wire antenna to pick these up, but I don't know for sure.
The OSD works great and I am able to run through all of the menus. I downloaded a copy of the manual and ran the self test, and everything checked out. I agreed with the expert when he suggested the H board, because the only input that isn't connected to the H board is the PC input, and it works.
Let me know if you want to tackle this one.