Unscrew cover of mainboard with a Cross-head screwdriver.
Check to see whether
wires in mainboard area
are broken.
DIAGNOSIS 1
Cut off the wire.
Peel off the sleeves.
Make sure wires are in proper order and connect them.
Tin soldering.
Step 5
Cover connecting point with electrical tape.
CHECK AND TEST 2
Step 1
Install the mainboard cover.
Perform current leakage
test.
Put one detector on
earthing wire of socket,
and another detector on surface of the appliance.