Network Hardware User Manual

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CHAPTER 8: Troubleshooting
8. Troubleshooting
8.1 Power Problems
Problem: The Pro Switching System does not power on. (The cooling fans do not
rotate; or when you press the LAMP TEST button, no LEDs on the System light.)
Solution #1: Make sure the power supply module is fully inserted into the rack
mount.
Solution #2: Make sure the AC power cord is properly connected to the rack mount,
and that the power cord is plugged into an AC power source.
Solution #3: Make sure the line fuse is good.
8.2 Control Card Problems
Problem: The LINK ON LED does not light.
Solution #1: Make sure that the control card is fully inserted into the rack mount.
Solution #2: Make sure that the power supply modules are functioning properly.
Solution #3: Make sure that DS5, the configuration DIP switch, is set properly.
Solution #4: Make sure that all socketed integrated circuit chips (IC chips) are
properly inserted into their sockets.
Problem: Power Supply OK LEDs do not illuminate.
Solution: Make sure that the power supply modules are functioning properly.
Problem: FAN FAIL LEDs illuminate.
Solution: Make sure that the power supply modules are functioning properly.
8.3 Switching Problems
Problem: Gang switching does not work.
Solution #1: Make sure that the KEY SWITCH is in the unlocked position.
Solution #2: Make sure that the interface cards are fully inserted into the rack
mount.