CHECK AND TEST 1
Step 1
Unscrew cover of mainboard with a Cross-head screwdriver.
Step 2
Insert multimeter detection pins into mainboard output.
Step 3
Open one fridge door.
Step 4
Test output of mainboard.
DIAGNOSIS 1
PROCEDURE 1
Step 1
Unscrew cover of mainboard with a Cross-head screwdriver.
Step 2
Disconnect terminals.
Step 3
Unscrew the mainboard.
Step 4
Pull out the buckle to remove the mainboard.
Reverse above steps to install a new mainboard.
CHECK AND TEST 2
Step 1
After replacing mainboard, open one fridge door to see if LED is on or not.
DIAGNOSIS 2
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