Reference - LG GB7143**AV Series Service Manual

Reference

1. TEST MODE and Removing TPA
1. How to make TEST MODE
If you push the test button on the Main PCB, the refrigerator will be enter the TEST MODE.
2. How to remove Terminal Position Assurance (TPA)
<AC TPA>
After measure the values, you should put in the TPA again.
Main PWB
* 1 time : Comp / Damper / All FAN on
(All things displayed)
* 2 times : Forced defrost mode
(22 22 displayed)
<DC TPA>
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