UN55HU9000FXZA, UN65HU9000FXZA, UN78HU9000FXZA
SUBJECT: No Power or power cycling.
SYMPTOM: TV does not turn on or keeps turning off and on continuously (power cycling).
REPAIR: There are several possible causes for the issue: the SMPS, Main board, One-Connect Box Main Board, or One-Connect Cable.
Please troubleshoot suspect parts in the order indicated in the text below to determine the actual cause. Start at 1. SMPS Check.
