Read LG 42LF75 / 42LF76 (CHASSIS:LD75B) Service Manual online
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(4) In the case of becomes unusual display from side S-video/AV mode
Is Video input of the
AV Jack (P1400)
normal?
Check the input source.
Is normal the Input voltage,
IICCommunication and HV sync?
Yes
No
No
Replace IC
No
Replace IC
No
Is normal the
CXA2069Q?
Yes
Same as Block A
(5) In the case of becomes unusual display from Component, RGB mode
Is R,G,B input and
H,V Sync of the J1100
normal?
Yes
Check the input source.
No
Same as Block A
(6) In the case of becomes unusual display from HDMI mode
Is normal the
HDMI002 (IC1004)?
Yes
Is normal the Input voltage, IIC
Communication and HV sync?
No
Same as Block A
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