PANASONIC Plasma TVs - TH-P65 _ TH-P55 _ TH-P50 _ TH-P42 - Vertical Line Fault & Troubleshooting
This symptom is very likely to be a A board defect; but for 2011 model the Panel and C board defect is a high possibility. One of the data driver IC is defective and 3.3V goes down, the other data driver ICs don’t work correctly. Because 3.3V is common for all data driver ICs. Vda line is isolated due to resistor being open.
Check by displaying some images. If the position of color bars changes and there are some black blocks, the data driver IC is defective. If there is no black bar block, check the connection of cables. [Between A and C boards]. If the trouble persists, the A board could be defective.
TROUBLESHOOT
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