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Chapter 6: Troubleshooting
6. Troubleshooting
6.1 General Failures
Table 6-1. General failures troubleshooting.
Diagnosis
Possible Reason
Measure
Config.txt parameter without function
Parameter not set or saved
• Write parameter into Config.txt file and save changes.
Start Commanc #CFG not set
• Write start command #CFG into first line of the Config.txt file.
Parameter written incorrectly
• Check correct spelling and capitalization.•
Extender not restarted
• Restart extender.
6.2 Blank Screen
CPU module, rear view
CON module, rear view
Figure 6-1. Blank screen.
Table 6-2. Blank screen troubleshooting.
Diagnosis
Possible Reason
Measure
LED 3 off
Power supply
• Check power supply units and the connection to the power network.
LED 1 on or LED 2 off
Connection between the CON unit and the CPU unit
• Check interconnect cables and connections.
CPU unit: LED 3 red or yellow
No video signal detected by source (computer, CPU)
• Check DVI-D cable to CPU.
• Download DDC information from console monitors (see Chapter 5).
Reboot CPU if necessary.
CON unit: LED 3 red or yellow
No monitor detected
• Check connection, length, and quality of the DVI-D cable to monitor;
tighten cable thumbscrews.
No video signal detected from CPU unit
• Check connection, length, and quality of the interconnect cables
between the units.
• Download DDC information from console monitors (see Chapter 5).
Reboot CPU if necessary.
