Panasonic TC-P50U50 T-2 TV keeps tunring off and on.

Panasonic TC-P50U50 T-2 TV keeps tunring off and on. TV turns off and on, displays message “An error has been detected an repaired” (or something like that). I have and OTA antenna plugged into the coax port and a fire stick in the HDMI port. ANSWERS:
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