IBM i 830 Repair Manual page 268

B6xx (including A6xx)
Reference Description/Action Perform all actions before exchanging
Code Failing Items
6905 Optical bus failed
An optical bus is inoperative due to a stuck line or an invalid
bus command. Any bus-related hardware may have failed.
Perform "BUS-PIP1" on page 285.
For this reference code the failing item list presented in the
"Service Action Log" can be different from the failing item list
documented here. That is due to the differences in system
models and features installed.
If the "Service Action Log" is available then use the failing item
list presented there for servicing this reference code.
If the "Service Action Log" is not available then use the failing
item list documented here. By following the procedures in the
symbolic FRUs listed here you will isolate to the correct FRU
list based on system model and features installed.
6906 High Speed Link (HSL) I/O bridge failure
LIC could not access part of the HSL I/O bridge VPD. The
bridge and HSL loop may be prevented from becoming
operational.
For this reference code the failing item list presented in the
"Service Action Log" can be different from the failing item list
documented here. That is due to the differences in system
models and features installed.
If the "Service Action Log" is available then use the failing item
list presented there for servicing this reference code.
If the "Service Action Log" is not available then use the failing
item list documented here. By following the procedures in the
symbolic FRUs listed here you will isolate to the correct FRU
list based on system model and features installed.
NOTE: A fiber optic cleaning kit may be required for optical
HSL connections.
6907 High Speed Link (HSL) I/O bridge failure
LIC detected invalid data in the HSL I/O bridge VPD. The
bridge and HSL loop may not have become operational.
For this reference code the failing item list presented in the
"Service Action Log" can be different from the failing item list
documented here. That is due to the differences in system
models and features installed.
If the "Service Action Log" is available then use the failing item
list presented there for servicing this reference code.
If the "Service Action Log" is not available then use the failing
item list documented here. By following the procedures in the
symbolic FRUs listed here you will isolate to the correct FRU
list based on system model and features installed.
NOTE: A fiber optic cleaning kit may be required for optical
HSL connections.
254
iSeries Model 830, 840, SB2, and SB3 Problem Analysis, Repair and Parts V5R1
Failing Item Location
FI00065
LBUSADP
AJDG301
SIIOADP
OPT_CLN
SIIOADP
OPT_CLN