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Yes
No
↓
Go to Step 4 of this procedure.
3. See "Locations — Models 830, SB2 System Unit with FC 9074 Base I/O Tower"
on page 709.
Replace the following FRUs in order one at a time until the problem is
resolved. See "Chapter 4. Removal and Installation Procedures" on page 617.
Note: Be sure to IPL in SLOW OVERRIDE mode after each replacement.
a. Memory Riser Card in location M02 in the System Unit
b. Memory Riser Card in location M05 in the System Unit
4. This is a Model 840, SB3 System Unit and FC 9079 Base I/O Tower.
See "Locations — Models 840, SB3 System Unit with Processor Tower and FC
9079 Base I/O Tower" on page 719. Replace the following FRUs in order one at
a time until the problem is resolved. See "Chapter 4. Removal and Installation
Procedures" on page 617.
Note: Be sure to IPL in SLOW OVERRIDE mode after each replacement.
a. Memory Cards in bank A in the System Unit
b. Memory Cards in bank B in the System Unit
c. Memory Cards in bank C in the System Unit
d. Memory Cards in bank D in the System Unit
This ends the procedure.
MUMIOCD
The failing item may be the Tower Card or the high-speed link (HSL) I/O adapter
card.
Perform the following:
1. Is the location from the Reference Code Table CB1?
Yes
No
↓
The HSL I/O bridge card may be the failing item.
Exchange the HSL I/O bridge card in location C08. To determine the
CCIN, part number and removal and installation procedure, locate card
position C08 and FRU name "HSL I/O bridge card" from the following:
v For Model 830, SB2 see Table 41 on page 710.
v For Model 840, SB3 see Table 43 on page 725.
This ends the procedure.
2. The failing item may be the Tower Card.
Exchange the Tower Card in position CB1. To determine CCIN, part number
and removal and installation procedure, locate card position CB1 and FRU
name " Tower Card" from the following:
v For Model 830, SB2 see Table 41 on page 710.
v For Model 840, SB3 see Table 43 on page 725.
This ends the procedure.
Chapter 3. Problem Isolation Procedures (PIPs), Failing Items, and Symbolic FRU Isolation
Symbolic FRUs
559
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