LG 50PB560B Service Manual page 24

2. No OSD Trouble Shooting
Check P600
5V_ON
Y
Check 5V Voltage Level
at P600
Y
Check 5V Voltage Level
at L600
Y
Check P500/P503
(RXAC-), (RXAC+), (RXBC-),
(RXBC+), Display Enable
Y
Check LVDS Cable
Y
Check PDP Module
Electrical Specifications
Power Supply Sequence
Check CAS
Input Signal Timing Specification
Control Signal Register
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Only for training and service purposes
N
Check GPIO Path of PM
N
Check Power connector
N
Replace one of L600
& Recheck
N
Maybe IC400
has troubles
N
Replace Cable
Y
Replace Power board
It should satisfy the Pixel Clock on CAS.
LGE Internal Use Only