IBM xSeries 150 User Reference Manual page 115

Table 16. Troubleshooting charts
Device
An IBM option that used to
work does not work now.
Parallel port
The number of parallel ports
displayed is less than the
number of parallel ports
installed.
Power problems
The server does not power on.
Printer problems
The printer does not work.
Verify that all of the option hardware and cable connections are secure.
If the option comes with its own test instructions, use those instructions to test the
option.
If the failing option is a SCSI option, verify that:
1. The cables for all external SCSI options are connected correctly.
2. The last option in each SCSI chain, or the end of the SCSI cable, is terminated
correctly.
3. Any external SCSI option is turned on. You must turn on an external SCSI option
before turning on the server.
If the problem remains, call for service.
Verify that:
1. Each port is assigned a unique address.
2. The parallel-port adapter, if you installed one, is seated properly.
If the problem remains, call for service.
Verify that:
1. The power cables are properly connected to the server.
2. The electrical outlet functions properly.
3. The type of memory installed is correct.
4. If you just installed an option, remove it, and restart the server. If the server now
powers on, you might have installed more options than the power supply
supports.
5. The LEDs on the power supply are on.
If the problem remains, call for service.
Verify that:
1. The printer is turned on and is online.
2. The printer signal cable is connected to the correct serial or parallel port on the
server.
Note: Non-IBM printer cables might cause unpredictable problems.
3. You have assigned the printer port correctly in your operating system or
application program.
4. You have assigned the printer port correctly using the Configuration/Setup
Utility program.
If the items above are correct and the printer still does not work, run the tests
described in the documentation that comes with your printer. If the tests show that
the printer is OK, call for service.
Suggested action
Chapter 4. Solving Problems
103