Panasonic TH-50PX70B upper screen fault

[G1ZMO]

I was recently given a Panasonic TH-50PX70B with a slight fault.
After a while the top half of the screen starts flickering and sometimes goes black.
After some googling I've seen that it might be the 'upper y buffer board' or the SU board however I havent been able to confirm that the part numbers I've found might be these boards
What I've found are:
TNPA4188 + TNPA4189 buffer boards
TNPA4169 1 C1 TXNC11HMTB
TNPA4170 1 C2 TCNC21HMTB
TNPA4189 1 SD TXNSD1HMTB

Can anyone tell me which of these might fix the problem please? (Picture of issue attached)

Thanks
Paul

[tw2005]

Re: Panasonic TH-50PX70B upper screen fault

TNPA4188 is the SU board (upper buffer)

[G1ZMO]

Re: Panasonic TH-50PX70B upper screen fault

Thanks tw2005

It's an intermittent problem. Could it just be a cable seating issue?

Is there anything I should be aware of if replacing the board? (other than allowing the tv to discharge overnight)

Thanks

[tw2005]

Re: Panasonic TH-50PX70B upper screen fault

you could try reseating any cables from the sc to the su but it looks most like a faulty SU.

[G1ZMO]

Re: Panasonic TH-50PX70B upper screen fault

OK, that's my first task for tomorrow. Failing that I'll order the SU board.
Will let you know how I get on.

Thanks
Paul

[G1ZMO]

Re: Panasonic TH-50PX70B upper screen fault

Reseated the ribbon cables but the fault persists so I'll order the board.
Will update the thread when it's replaced.