2011 Panasonic TC-P50GT30 7 Blinks Help

[PanasonicPlasmaProblems]

Hello all.

My Panasonic Plasma is on its 2nd 7 blinks error. I fixed it the first time using a repair kit for ShopJimmy. Well its back 1.5 years later. Was SC board so bought a used SC board off ebay. Replaced and got same 7 blinks. The green LED on the SC board never lit up. Unhooked SC from buffer boards SD and SU and removed grounding screws connecting SC to bufferboards and shorted SC50 and still 7 blinks. So now I am assuming the SC board I was sent was bad. To see if the TV would just stay on I unhooked the power and ribbon cable from the SC board and turned it on. I get 8 blinks. From my research I see most 8 blink errors mean the SS board is shorted. Is this true?

I also used a multimeter set to check continuity and checked the ribbon connections on the buffer boards SD and SU. No beeps and was getting a reading of .800 and lower. From research again this tells me the buffer boards are okay. Is this also correct?

I have a 42" Panasonic TC-P42ST30 in the basement we don't use much. Does anyone know off hand if I could "borrow" parts off that to see if I can't figure out the issue. I can open up the back and check if need be but just wanted to save some time.

Thanks for the help!

[tvtimmy]

Re: 2011 Panasonic TC-P50GT30 7 Blinks Help

Use your meter in beep mode and check the sc and ss power connections for a short. A beep longer than 2 seconds means short. And no you can't use anything from the 42" to diagnose.

[PanasonicPlasmaProblems]

Re: 2011 Panasonic TC-P50GT30 7 Blinks Help

Thanks tvtimmy.

I checked for shorts on the power connections on ss and sc board and there were none. I check all the wires from the P board to the sc and ss board and all wires were good.

I did make a little progress. When I turn the tv on I can now hear a buzz and the green LED on the SC board will light up only for a second then a click and then the 7 blinks comes back. Any idea on what is causing that?

Thanks!

[PanasonicPlasmaProblems]

Re: 2011 Panasonic TC-P50GT30 7 Blinks Help

Also removed all three connections between SC and the SU and SD boards (SC41, SC42, and SC46). Removed the 4 VFG screws between the boards and jumped SC50. Fired it up and get 6 blinks.

[Moreno83]

Re: 2011 Panasonic TC-P50GT30 7 Blinks Help

6 blinks after replacing the FETS is usually a DG302 on the SC board or the driver chip. ( IC501 ). DG302 will probably not read short but it is wise to replace it.

When SS board fails it is usually the Q201 close to the blue cap. Read it in diode mode over the 2 pins. Beep is bad.

[tvtimmy]

Re: 2011 Panasonic TC-P50GT30 7 Blinks Help

Make sure all screws are tight also.