P.S. Более предметно (по вышепомянутой ссылке):
2. Check the location for voltage of the AC Driver PCB (UN14) => Replace with a correct AC Driver PCB (UN14) for the location in the case of mismatching.
3. Check failure between the AC Driver PCB (UN14/J103) and the Fixing Assembly (UN37/J123, UN13/J13). (trapped cable, open circuit, connector disconnection)
=> Replace the part in the case of trapped cable/open circuit
Что-то из этих пунктов сделано?