TH-65PZ850U, TH-58PZ850U, TH-50PZ850U,
TH-46PZ850U, TH-58PZ800U, TH-50PZ800U,
TH-46PZ800U, TH-42PZ800U, TH-50PZ80U,
TH-46PZ80U, TH-42PZ80U, TH-50PX80U,
TH-42PX80U, TH-50PZ85U, TH-46PZ85U,
TH-42PZ85U
PCB Designation: A boards supplied from factory
Part #: TNPH0716XXX, TNPH0721XXX & TNPH0731XXX series
Symptom:
Once AC power cord is plugged in, unit will turn on by itself. Depends on factory settings, unit will either
display Video, Component or Tuner icon. After few seconds, screen will change to service mode automatically.
NOTE: Since unit is in service mode, only buttons 1, 2, 3 or 4 on remote are working (rest of buttons are nonfunctional).
Cause: All new A boards supplied from factory needs to be initialized.
Remedy:
1. Perform HARD RESET of Plasma TV unit by pressing & holding VOL DOWN (-) on unit and MENU
button on remote at the same time for about 3 seconds.
2. After hard reset, please confirm if Plasma TV powers ON in user mode and check overall functionality.
