IBM Application System/400 Service Information page 15

Table 1-1 (Page 2 of 3). Start Table
Symptom What You Should Do
You cannot power off the system. Go to "Cannot Power Off System (No SRC)" on
page 1-7.
The control panel is not working. Go to "Checking the System Control Panel" on
page 1-8.
All workstations are not working, or all workstations on
For twinaxial workstation or console failures, go to
a port are not working correctly. ''Twinaxial Workstation liD Processor Problem Isolation
Procedures" on page 3-15.
The system loses the date and time. Perform the Control Panel Battery Check, see
Appendix B, "Preventive Maintenance (PM) Checklist"
on page B-1.
You cannot perform an IPL. Go to "Cannot Perform IPL (No SRC)" on page 1-5.
You cannot perform an IPL at a specified time (no Go to "Cannot Perform IPL at a Specified Time (No
SRC). SRC)" on page 1-9.
You cannot perform an IPL from a remote location (no Go to "Cannot Perform IPL from a Remote Location
SRC). (No SRC)" on page 1-11.
The system performs an IPL that is not wanted. Check, and if needed, exchange the following parts:
•
Control panel battery (see "Control Panel Battery"
on page 4-5)
• Chassis (see "Chassis" on page 4-2)
The system is in a loop. Go to "System Hangs or Loops (No SRC)" on
Note: The system may be in a loop when one or
page 1-5.
more of the following conditions are true:
• An IPL does not complete.
• System operations have stopped.
• Attached devices no longer operate.
The external tape unit has one or more of the following Go to the external 1/4-inch tape unit documentation
symptoms:
• The panel on the front of the tape unit shows an
error condition.
• The unit does not indicate ready.
• The unit is not working.
Chapter 1. Starting Problem Isolation
1-3