Check the various cable connections first.
Check to see if there is a burnt or damaged cable.
Check to see if there is a disconnected or loose cable connection.
Check to see if the cables are connected according to the connection diagram.
Symptom: The unit is dead. No led’s on the front cover light up.
Major checkpoints: Check the following:
Check the internal cable connection status inside the unit.
Check the fuses of each part.
Check the output voltage of SMPS.
