Read LG 42LB2R (CHASSIS:LP62E) Service Manual online
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2. Protection mode
(1) Symptom
1) Minute discharge doesn’t occur at module.
2) Front LED doesn’t come into action
2) Front LED doesn’t come into action
(2) Check following
Start check
Yes
No
Is the PSU normal?
Is output the normality Low/High
Voltage except Stand-by 5V?
Voltage except Stand-by 5V?
Replace the power board.
Replace the power board.
Is the output voltage normal after
remove P1 connector of Y-Boad?
remove P1 connector of Y-Boad?
Replace Y-Board.
Replace the fuse.
Yes
No
Is the each
connector normal?
Agter connecting well each connector,
the normality it operates?
the normality it operates?
Yes
No
No
Yes
Is the output voltage normal after
remove P1 connector of Z-Boad?
remove P1 connector of Z-Boad?
Replace Z-Board.
Replace the fuse.
No
Yes
Is the Y-Board normal?
Is the fuse (FS2,
FS3) on Y-Board
normal?
Is the fuse (FS1,
FS2) on Z-Board
normal?
Yes
No
Is the
output voltage normal
after remove P100, P110, 200,
210 connector of
X-Board?
No
Is the Z-Board normal?
Is the X-Board normal?
After remove P100, 110 output voltage
normality : Replace Right X-Board.
After rmove P200, 210 output voltage
normality : Replace Left X-Board.
normality : Replace Right X-Board.
After rmove P200, 210 output voltage
normality : Replace Left X-Board.
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