Panasonic 42ST50E problem (half screen distorted)


Standard Member
Unfortunately, my 42ST50E has developed a nasty bug. After 10 years of service. At first only intermittently, but as time progressed, more often, right side of the screen would garble up like thar on the first image.

So, I have opened the unit, cleansed the dust, checked all connections, power supply for "cold joints", but nothing helped. I checked chips and boards, but nothing gave way... After entering the service mode, the tests worked only on the healthy, left part of the screen. Bummer. This usually means there is a problem on the traces between main board and panel.

So I have removed retention bar at the bottom, as I suspected there could be a bad connection on the flat cable that comes out of the panel matrix. Unfortunately, I was correct. Every fourth flat cable was bad, as depicted on the second photo.

Does anybody want some board from this unit? Or, you have a good panel that I could swap?


  • 5544C504-C303-4B67-A67B-6AD50047B50C.jpeg
    276.4 KB · Views: 34
  • 6B3C32CC-53FB-4FE4-8CF2-F1763EB4C9CD_1_201_a.jpeg
    211.8 KB · Views: 35

The latest video from AVForums

Samsung QN95B 4K QLED TV Review
Subscribe to our YouTube channel
Support AVForums with Patreon

Top Bottom