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TV red light blinks 14 times over and over with no picture or sound. Panasonic Viera 50" Tc-p50st30 I did a hard reset and cleaned the dust off the boards…..nothing but 14 blinks. I also unhooked the A board and plugged back in and turned on. Red light just stayes on….. ??
@alsf250 start with this information: 14 BLINKS This code is triggered if there are abnormalities during data exchange with the standby CPU ROM. No F15V connected to the A board at plug-in (Open connection of both pins 10 & 11 between P6 and A6) Shorted F15V developed after the TV is up and running. Holding the power switch for over 5 seconds after the unit has gone into shut down and it’s in lock mode with the power LED solid red (Note: the LED stays on if the power button is momentarily pressed). Commonly failed boards are the A- P
This model also has issues with the SC board " if you have a multimeter , measure the resistance at Vsus lines to the SC and SS and see if dead short. TV off . If shorted then you’ll have to isolate Vsus power to each board (SC , SS) and check at the SC and SS connectors. Or , remove the Vsus power lead from the SC, turn the TV on, if the front LED starts flashing like it’s starting up and then stops with a different SOS code (other than solid or 14 blinks) that would indicate what was just removed was shorted. If no change, reconnect (check there’s no residual voltage present), do same for SS. From here Could be SC or SS.
I have the same issue with my Panasonic TC-P50ST30: Pressing the power button results in some clicking, as if the TV is turning on, followed by a solid red LED; pressing it again results in 14 LED blinks. I have replaced the A and P boards, with no change in results. At this point, I’ve sunk more money into trying to fix it than a new TV, which I just bought. I hate to just throw it out, which is unfortunate, but this TV is going to the landfill this weekend; I’m just not going to keep throwing money at a 10-year-old “smart” TV, which pretty much all of the streaming providers have abandoned in the past year anyway, so I can’t even stream Netflix or Prime Video on it anymore.
@oldturkey03 Thanks for the suggestion above on testing the SC board. I did have a short on that board. Zero resistance when connecting the multimeter to the Vsus power terminal after disconnecting. I’m not technical enough to determine where on the board the issue is but replaced it with one from Ebay (a little difficult to find the exact one I needed) and I’m back in business! Had you not suggested that, I would have tried the A or P board which both still work. I originally had 14 blinks. 7 blinks when I took the SC board out which gave me more confidence that it was the issue. Really appreciate this forum. You may not remember, but you helped me years ago when the A board went out. Still using this TV. Would be nice to buy a newer one but plenty happy to keep this one going. Thanks again! Doug
This is problm show that is foult in your power supply not in A board
That seems to be the consensus of various places I looked, so I purchased a power board and replaced it; but no change. 14 repeating blinks. Then I got to looking around even more online, and Several forums that technicians frequented, could be one of three boards Most likely the power board, then the A board and then one of the other boards, the long thin board on the left-hand side, looking at it from the back. The board that has all the connections is the next most likely bad board which I recently procured on eBay. I’ll be replacing that soon and I’ll get back with the results . Seems to be a common problem with this really popular plasma TV back in 2011, the Panasonic ST 30 series. I remember being so amazed by the picture quality and the 3-D Version of avatar Blu-ray that came with it. The fellow that spent 11 years that I seem to recall it was their primary person involved in Developing that 3-D movie wouldn’t allow the 3-D version to be viewed on any other 3-D TV except the ST 30 series and above. For several years you could not buy the 3-D version commercially, only the 2-D version . I was in sales in the electronics department at the Sears at the time and always thought that was a peculiar deal that’s it could be set up that way. Best, Seth
Don’t have an answer. After 9 + years, my Panasonic TC-P42S30 shut off and put itself into SOS mode almost immediately after turning on. This happened with the set ‘cold’ as it was the first use of the day. Initially, the power LED was blinking 5 times and I tried to do a reset using different techniques I found online. None of those worked. I unplugged it again from power and waited a few hours. When trying to start it up again, the LED begain blinking 14 times. That’s where I’m at now AL V. Tom V
Hi Anyone:
Any updates? I’ve now got the same issue on my Panasonic Viera plasma, great pix, hate to lose it. 14 blinking lights. Ain’t gonna mess with replacing boards. Kevin
Buffer board repair thru ebay vendor Quad City Electronics fixed my 42 panny plasma. Good as new for $100.
@tv255 I’m interested in giving it a shot if you can provide details. I have replaced the power board in the past which bought another 4 years or so, so I’d like to see how much longer I can drag this TV along :)
