IBM i 830 Repair Manual page 273

Reference Description/Action Perform all actions before exchanging
Code Failing Items
6970 High Speed Link (HSL) resource failure
A system PCI bus failure was detected. Word 7 of the SRC
contains the bus number.
This error is most likely in the hardware that makes up the PCI
bus, the PCI bus side of the HSL I/O bridge or the
multi-adapter bridge. In some cases it may be caused by a
failing IOP in the multi-adapter bridge's domain. When an IOP
is causing the problem, the failing IOP cannot be identified.
Exchange the failing items in the order they are listed in the
SAL or this document until you get to the PIOCARD failing
item. If the problem still exists after exchanging the failing
items up to, but not including, PIOCARD then perform "BUS
PIP MAB-03" on page 315 to determine the failing I/O
processor card.
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.
6971 High Speed Link (HSL) resource failure
Failure in a multi-adapter bridge or on the bus to the card
location it controls.
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.
Perform "BUS PIP MAB-02" on page 314
B6xx (including A6xx)
Failing Item Location
SI_PHB
PRI_PCI
MA_BRDG
PIOCARD
OPT_CLN
MA_BRDG
MASBUS
PIOCARD
Chapter 2. Unit Reference Codes
259