Zigen HX-44 - Manual (Page 25)

Matrix Switching System—User Manual
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(3) Check if the output port number is the same as the controlled port number.
(4) If none of the above circumstances happen, it could be internal failure of the product
itself.
6. What do I do if I sense power leakage during plugging or unplugging of the
input/output ports?
Answer: It could be that the equipment power is not properly grounded. You must
properly ground your equipment; otherwise product life can easily be
shortened.