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22LG300C (CHASSIS:LD85A) - LG TV Service Manual (repair manual). Page 18

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- 18 -
Check the input source.
Same as Block A.
No
Check the  IC900, IC901.
No
Check the IC902.
No
Check the IC902.
No
Yes
Is video
input of the HDMI
jack normal? (Check
JK900,901)
Yes
Check DDC
communication
lines(IC900,901_
Pin5,6
Yes
Check HDCP
communication lines
(IC902)
No
Is waveform
of Switching IC normal?
(Check IC902)
9. Unusual display from HDMI 1/2 mode
Page of 30
Display

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