IHSE USA 474 Series Draco major - Manual (Page 159)

Specifications
2011-10-11 159
8.3 Blank Screen
1 1 1 2 3
1 2 3 3
Rear View Front View
Diagnosis Possible Reason Measure
Switching to a CPU Port
without active Source
(computer, CPU).  Switching to a CPU Port with an
active source (computer, CPU).
Monitors
remains dark
after switching
operation
Connection of a console
with a CON port or
connection of a CPU to a
CPU port not established
correctly.  Check connections regarding
CON and CPU ports at the
matrix.
LED 1 on or
LED 2 off Connections CON unit,
matrix and CPU unit.  Check connecting cables and
connectors. (No cable, cable
break, CPU/CON unit offline,
CPU/CON unit connected to the
wrong port)
CPU unit LED 3
green Connection between
CON unit, matrix and
CPU unit  Establish a connection between
CON unit and CPU unit via
matrix