Troubleshooting Checklist
Troubleshooting
4-9
Table 4-5
Power System Troubleshooting
Possible Causes
Instruction
Loss of Power to the 6C105
chassis.
Perform the following steps:
1. Check ON/OFF switches of 6C105 power supplies. All
switches must be in the ON ( | ) position.
2. Check all power cords and cables for proper connection.
Examine power cords for fraying or other damage. Replace if
necessary.
3. Examine 6C105 chassis power supplies. If power supply
LEDs or audible warning tone indicate power supply
problems, troubleshoot or replace any faulty power supplies.
Fault in 6C105 power bus.
1. Remove the module from the current slot and re-install in
another free slot in the chassis.
2. If the module functions in the selected slot, the module’s
onboard power converter is operational. The 6C105 chassis
power bus may have a localized fault. Install the module in
the working slot and contact Cabletron Systems.
3. If the module does not function in the selected slot, continue
the process with all module slots in the chassis. If the module
does not function in any slot, the chassis power bus may have
a system-wide fault or the module onboard power converter
may be inoperable. Diagnose the module power converter as
described below to isolate the fault.
Fault in module power
converter.
1. Remove a working module from a known good chassis.
2. Install the module in the known good slot.
3. If the module does not function, there may be a fault in the
onboard power converter. Contact Cabletron Systems
immediately.
