Black Box ServSwitch DKM FX - Blank Screen; Contacting Black Box

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Chapter฀7:฀Troubleshooting
7.7 Blank Screen
1 2 3
1 2 3 3
Figure 7-1. LEDs on the ServSwitch DKM FX.
Table 7-7. LED indications.
ProblemPossible฀CauseSolution
Monitor remains dark after
switching operation
Switching to a CPU port
without active source
(computer, CPU)
Connect the computer or CPU
Connection of a console
with a CON port or
connection of a CPU to a
CPU port not established
correctly
Check CON and CPU port connections at the
ServSwitch DKM FX
LED 1 on or LED 2 off
Connections of the CON
unit, ServSwitch DKM FX,
and the CPU unit
Check the cables and connectors (no cable,
cable break, CPU/CON unit off-line, CPU/CON
unit connected to the wrong port
LED 3 off Power supply
Check the power supply units and connection
to the power network
7.8฀Contacting฀Black฀Box
If you determine that your ServSwitch DKM FX is malfunctioning, do not attempt
to alter or repair the unit. It contains no user-serviceable parts. Contact Black Box
Technical฀Support฀at฀724-746-5500฀or฀info@blackbox.com.
Before you do, make a record of the history of the problem. We will be able to
provide more efficient and accurate assistance if you have a complete description,
including: