IBM iSeries Series Hardware Problem Analysis And Isolation page 287

v Yes: Continue with the next step.
v No: Go to "Starting point for all problems" on page 2 and follow the service actions for the new
SRC.
5. Power off the system from the control panel. Attempt to IPL from a different load sources device:
v If the failing IPL was mode D from an optical storage device unit alternate IPL media, then use the
tape device unit as the load-source device and attempt to IPL mode D.
v If the failing IPL was mode D from a tape unit alternate IPL media, then use the optical storage
device unit as the load source device and attempt to IPL mode D. (Temporarily disconnect the tape
device unit from the system if possible.)
Does the same SRC occur?
v Yes: Continue with the next step.
v No: Choose from the following options:
– If there is a different SRC, go to "Starting point for all problems" on page 2 and follow the
service actions for the new SRC.
– If this IPL was successful, then the failing item is the original alternate IPL load-source device.
- If the load-source is an optical storage unit, exchange the IPL media on the compact disk in
the alternate IPL optical storage unit. If replacing the media does not work, try replacing the
optical storage device unit.
- If the load-source is a tape unit, exchange the IPL media on the tape in the alternate IPL
tape unit. If replacing the media does not work, try replacing the tape device unit.
6. The failing item is one of the cards or devices that is attached to the interface for the alternate IPL
load-source device.
7. Choose from the following options:
v If you are on a Model 270 or 820: Continue with the next step.
v If you are on a Model 830, 840, SB2, or SB3: Go to step 13 (See page 276).
8. Is this system a Model 270?
v Yes: Continue with the next step.
v No: Go to step 11 (See page 275).
9. See Locations — Model 270. Remove all of the IOPs and IOAs, EXCEPT for the first storage IOA.
(Normally this would mean to remove all of the cards in locations C07, C06, C05, C04, C03, and C02
- but leave the card in location C01.)
Attempt to perform the alternate IPL.
Does the same SRC occur?
v Yes: Continue with the next step.
v No: If the system IPLs past the original error, then isolate to the failing IOP or IOA card. Follow the
service actions for the new SRC.
This ends the procedure.
10. Remove and label all of the storage device units EXCEPT for the alternate IPL load-source device
unit you are currently using. (This includes all of the disk devices in D01 - D06.)
If the system IPLs past the original error, then isolate to the failing device unit. If the failure still
occurs, replace the following FRUs one at a time until the problem is resolved. See the Remove and
replace procedures.
v First storage IOA
v System unit backplane in location MB1
This ends the procedure.
11. See Locations — Model 820. Remove all of the IOPs and IOAs on bus 1, EXCEPT for the first
storage IOA. (Normally this would mean to remove all of the cards in locations C06, C04, C03, C02,
and C01 - but leave the card in location C05.)
Attempt to perform the alternate IPL.
Analyze hardware problems
275