Hi,
I have a Panasonic Plasma TCP42S30 (2011) TV that went out a week or so ago. The picture went out and when I turned it back on I had a solid red LED light, but no picture (no signs of dimming etc).
After diagnosing the problem I came to the conclusion I had a shorted SN board (mostly because of unplugging the SN board gave me 7 blinks and everything else I still got a solid LED).
So I sent it to a repair person on Ebay who specifically fixes these boards and when he received it said the SN board had 4 shorted Mosfets. He fixed the board, shipped it back.
I got it back today, installed the repaired board. Hooked up everything, (even new screws), everything tight. The TV fired up normally, but with 3 horizontal black bars across the screen (about 2 inches wide).
Everything else looked good, green LED on both SN and SS boards, low buzzing from power supply, A board looks fine etc.
So I looked online about the horizontal bars and found it's commonly caused by ribbon cables to the SN board that aren't seated correctly.
So I go and reseat the first ribbon cable and the top 1st black bar goes away. I then reseat the next cable and the 2nd bar goes away. I'm in the process of taking out the 3rd ribbon cable to reseat it and the TV shuts down. I power back up and get no picture and 7 blinks.
The TV has been powered on the entire time throughout the process (about 10-15 minutes of a normal picture with black bars) until it shuts down.
I then try to diagnose the 7 blink problem and find out that the SN board has once again been shorted somehow.
It doesn't matter which cable I unplug power from the SN board, SS board, I still get 7 blinks.
Please give me some direction experts
What's my next step? Sending the SN board back to get repaired for the 2nd time?
Thanks,
Tommy
I have a Panasonic Plasma TCP42S30 (2011) TV that went out a week or so ago. The picture went out and when I turned it back on I had a solid red LED light, but no picture (no signs of dimming etc).
After diagnosing the problem I came to the conclusion I had a shorted SN board (mostly because of unplugging the SN board gave me 7 blinks and everything else I still got a solid LED).
So I sent it to a repair person on Ebay who specifically fixes these boards and when he received it said the SN board had 4 shorted Mosfets. He fixed the board, shipped it back.
I got it back today, installed the repaired board. Hooked up everything, (even new screws), everything tight. The TV fired up normally, but with 3 horizontal black bars across the screen (about 2 inches wide).
Everything else looked good, green LED on both SN and SS boards, low buzzing from power supply, A board looks fine etc.
So I looked online about the horizontal bars and found it's commonly caused by ribbon cables to the SN board that aren't seated correctly.
So I go and reseat the first ribbon cable and the top 1st black bar goes away. I then reseat the next cable and the 2nd bar goes away. I'm in the process of taking out the 3rd ribbon cable to reseat it and the TV shuts down. I power back up and get no picture and 7 blinks.
The TV has been powered on the entire time throughout the process (about 10-15 minutes of a normal picture with black bars) until it shuts down.
I then try to diagnose the 7 blink problem and find out that the SN board has once again been shorted somehow.
It doesn't matter which cable I unplug power from the SN board, SS board, I still get 7 blinks.
Please give me some direction experts

Thanks,
Tommy
Comment