IBM 8685 Hardware Maintenance Manual - Page 167

DASD checkout, Host built-in self test (BIST), Bus fault messages, Undetermined problems

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DASD checkout Note: See "System" on page 162 to determine which components should be replaced by a field service technician. Message Action Hard drive x removal detected (level-critical; hard drive x has been removed) v Information only, take action as appropriate. Host built-in self test (BIST) Note: See "System" on page 162 to determine which components should be replaced by a field service technician. Message Action Host fail (level-informational; built-in self-test for the host failed) 1. Reseat the microprocessor. 2. Reseat the VRM. 3. Replace the microprocessor. Bus fault messages Note: See "System" on page 162 to determine which components should be replaced by a field service technician. Bus fault messages Message Action Failure reading I2C device. Check devices 1. If installed, reseat the I2C cable between the Remote on bus 0. Supervisor Adapter (in PCI slot 1/J26) and the system board (J16). 2. Memory DIMMs. 3. Memory card. 4. System board. Failure reading I2C device. Check devices 1. Reseat the cable between the operator information panel and on bus 1. system board (J46). 2. Operator information panel. 3. System board. Failure reading I2C device. Check devices 1. Reseat the cable between the system board and the power on bus 2. supply (power backplane) (J40). 2. Power backplane. 3. Power supply. 4. System board. Failure reading I2C device. Check devices 1. Reseat the cable between the DASD backplane and connector on bus 3. (J15) of system board. 2. DASD backplane. 3. System board. Failure reading I2C device. Check device v System board on bus 4. Undetermined problems Use the information in this section if the diagnostic tests did not identify the failure, the devices list is incorrect, or the system is inoperative. Chapter 6. Symptom-to-FRU index 157

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DASD checkout
Note:
See “System” on page 162 to determine which components should be replaced by a field service technician.
Message
Action
Hard drive
x
removal detected
(level-critical; hard drive
x
has been
removed)
v
Information only, take action as appropriate.
Host built-in self test (BIST)
Note:
See “System” on page 162 to determine which components should be replaced by a field service technician.
Message
Action
Host fail
(level-informational; built-in
self-test for the host failed)
1.
Reseat the microprocessor.
2.
Reseat the VRM.
3.
Replace the microprocessor.
Bus fault messages
Note:
See “System” on page 162 to determine which components should be replaced by a field service technician.
Bus fault messages
Message Action
Failure reading I2C device.
Check devices
on bus 0.
1.
If installed, reseat the I2C cable between the Remote
Supervisor Adapter (in PCI slot 1/J26) and the system board
(J16).
2.
Memory DIMMs.
3.
Memory card.
4.
System board.
Failure reading I2C device.
Check devices
on bus 1.
1.
Reseat the cable between the operator information panel and
system board (J46).
2.
Operator information panel.
3.
System board.
Failure reading I2C device.
Check devices
on bus 2.
1.
Reseat the cable between the system board and the power
supply (power backplane) (J40).
2.
Power backplane.
3.
Power supply.
4.
System board.
Failure reading I2C device.
Check devices
on bus 3.
1.
Reseat the cable between the DASD backplane and connector
(J15) of system board.
2.
DASD backplane.
3.
System board.
Failure reading I2C device.
Check device
on bus 4.
v
System board
Undetermined problems
Use the information in this section if the diagnostic tests did not identify the failure,
the devices list is incorrect, or the system is inoperative.
Chapter 6. Symptom-to-FRU index
157