26LH200C, 26LH210C (CHASSIS:LP91Z) - LG TV Service Manual (repair manual). Page 20

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Is  the supply
12V power of RJP good.
(JK900_Pin1)
Is the I2C communication good.
(IC101)
. Check the supply power.
Check the RJP  & 
Replace the RJP.
YES
YES
NO
NO
Check the  RJP  item
on SVC Menu
YES
Replace the RJP item from No to Yes.
. Check the I2C line of IC101.
NO
12. Not operate RJP
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