Repair Flow Chart:Trouble Condition
Green Power LED does not turn on. The TV is dead.
Green Power LED:
Does not turn ON.
The TV is dead.
For Main board:
Is the “5VSTB” working normally?
(see TABLE*1.0)
Unplug(K7B) connector on
Power board. On Power board:
Is the “5VSTB” working normally?
(see TABLE*2.0)
Power board can not work.
Replace “Power board”.
Replace “Main board”.
Main board can not work.
Replace “Main board”.
No:0v
No:0v
Yes:5v
Yes:5v
Main board can not work.
Page 1
(TABLE *1.0)Main board:5VSTB Test Points
42" Models
5VSTB on
Main
board
Confirmation Voltage
P42142-00 Z5GH
P42142M-00 Z5GHM
P42142-02 Z5GK
P42142M-02 Z5GKM
Main
K8B Pin3
5V
(TABLE *2.0) Power board:5VSTB Test Points
42" Models
5VSTB on Power board
Confirmation Voltage
P42142-00 Z5GH
P42142M-00 Z5GHM
P42142-02 Z5GK
P42142M-02 Z5GKM
Power K7B Pin3
5V