ServerNet Cluster 6780 Operations Guide (G06.24+, H06.03+)

Troubleshooting and Replacement Procedures
ServerNet Cluster 6780 Operations Guide—525606-002
3-9
Green Power LED Is Not Lit
Green Power LED Is Not Lit
If the green power LED does not light:
1. If the CRU has just been replaced, wait several minutes for the power-on self tests
(POSTs) to complete.
2. Make sure the power cords are properly connected.
3. Make sure that the switch components are properly seated in their slots.
4. If you continue to have problems, disconnect and reconnect the power cord.
Green Link-Alive LED Is Not Lit
If the link-alive LED does not light:
1. Disconnect and reconnect the cable, using care to align the key on the cable plug
with the connector.
2. If possible, try connecting a different cable. Make sure to use the correct type of
cable (single-mode fiber-optic (SMF) or multimode fiber-optic (MMF)).
3. If the cables are properly connected and one or both LEDs fail to light, a PIC or
cable might be faulty.
Yellow Fault LED Is Lit
A yellow fault LED that is lit (not blinking) indicates an error. The CRU may not be
correctly seated in the slot, or the CRU might have been inserted too slowly.
1. Wait a few minutes to see if the fault LED clears.
2. If the problem continues, completely remove the CRU from its slot.
3. For power supplies, wait 5 seconds before reinserting the CRU.
4. Reinsert the CRU into its slot.
Yellow Fault LED Is Blinking
A blinking yellow Fault LED does not indicate an error. Both OSM and SCF allow you
to blink this LED on a CRU to help you locate the CRU.
To turn the blinking off, either:
•
From OSM perform the Blink LED Off action for the CRU.
•
From SCF use the ALTER SWITCH Command to set the BLINK option to NONE.