CHECK AND TEST 1
Step 1
Unscrew cover of mainboard with a Cross-head screwdriver.
Step 2
Check if the earthing wire is connected well.
Step 3
Check to see whether wires in mainboard area are broken.
DIAGNOSIS 1
PROCEDURE 1
Step 1
Cut off the wire.
Step 2
Peel off the sleeves.
Step 3
Make sure wires are in proper order and connect them.
Step 4
Tin soldering.
Step 5
Cover connecting point with electrical tape.
Step 6
Unscrew cover of mainboard with a Cross-head screwdriver.
CHECK AND TEST 2
Step 1
Power on and perform a
leakage test.
Put one detector on
earthing wire of socket,
and another detector on
surface.
DIAGNOSIS 2
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