Panasonic TH-50PC77U - 7 Caution statement; 7.1. Caution statement

7 Caution statement
7.1. Caution statement.
Caution:
Please confirm that all flexible cables are assembled correctly.
Also make sure that they are locked in the connectors.
Verify by giving the flexible cables a very slight pull.
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TH-50PX77U / TH-50PE77U