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42LB1R (CHASSIS:ML051B) - LG TV Service Manual (repair manual). Page 17

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- 17 -
NO VIDEO
REPLACE LCD MODULE
CHECK THE PERIPHERAL
IC800
CHECK LVDS Output
P3(PIN 21, PIN 22)
No
CHECK THE PERIPHERAL
IC1
DOWN LOAD ISP DATA
or REPLACE MAIN BOARD
Check L2
(12V)
No
Yes
CHECK L1022
(24V)
CHECK R898
(3.3V)
No
Yes
Yes
Yes
No
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