LG LFX28978 series Service Manual page 38

9-5 Refrigerator room lamp doesn't work
No
1 Check the Refrigerator door switch.
2 Check the door S/W resistance.
3 Check the Black to Orange.
4 Check the Red to Blue.
5 Check the Red to Blue.
Checking flow
<CON6>
Result & SVC Action
If it is stuck, Change the door s/w.
Status Result
0
Normal
not
Infinity
Push
S/W
Other
Status Result
12 V
Normal
Other
Status Result
12 V
Normal
Other
Status Result
0 ~ 2 V
Closed
Other
12 V
Open
Other
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SVC Action
Go to the 3
Change door S/W
Go to the 3
Change door S/W
SVC Action
Go to the 4
Change the PCB
SVC Action
Go to the 5
Change the LED Lamp
SVC Action
It's normal
Change the Door S/W
It's normal
Change the LED Lamp