During a surgery the arm of the surgical light began to crackle and smoke.The light was turned off and this stopped.The patient was not injured.After the surgery the light was turned back on and short circuited.The light no longer works.Investigation reveals that a mechanical stop in the light failed.It is unknown when this stop failed.This stop prevented the light from rotating 360 degrees.Full rotations of the light rotated the internal wiring and weakened it.This led to the light smoking and short circuiting.
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