LG 22LU7000 Service Manual page 19

2. Protect mode
(1) Symptom
1) After once shining, it does not discharge minutely from module.
2) It is converted with the color where the front LED is red from blue.
(2)
Check follow
Is normal the Power
Board?
Is normal the each
connector?
Is normal the Main
Board?
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No
Yes
No
Yes
No
Is output the normality
Low/High .voltage?
After connecting well
each connector, the
normality it operates?
Is normal the output
voltage after remove
JP1 of Main Board?
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No
Replace Power Board.
No
Replace Power Board.
No
After remove JP1
normal operation:
Replace Main Board
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