CHECK AND TEST 1
Step 1
Unscrew cover of mainboard with a Cross-head screwdriver.
Step 2
Put detect pins of multimeter into output of mainboard.
Step 3
Power on the appliance and open fridge door.
Step 4
Test output of mainboard for LED light.
DIAGNOSIS 1
PROCEDURE 1
Step 1
Unscrew cover of mainboard with a cross-head screwdriver.
Step 2
Disconnect terminals.
Step 3
Prize off earthing wires.
Step 4
Unscrew the mainboard.
Step 5
Pull out the buckle to remove the mainboard.
Reverse steps above to install a new mainboard.
CHECK AND TEST 2
Step 1
Power on the appliance, open fridge door, check if LED light is on or not.
Step 2
Press down the mechanical switch, check if LED light is off or not.
DIAGNOSIS 2
