Check that the soldered wire is solid and will not come loose. A good jiggle jiggle and a wiggle wiggle and if its good we let it ride.

Reassemble the clippers taking note to make sure that the switch is seated in the correct position and that the bottom cable and cap are also seated properly before replacing the top cover.

Replace the 2 Y1 bottom screws. The smaller of the screws.

Replace the 2 Y1 top screws the larger of the screws.

Test Clippers. Problem Resolved.