Serial Port Problems - Lenovo System x3500 M5 Type 5464 Installation And Service Manual

Table 28. Power problems and actions (continued)
Symptom
The server does not turn off.
The server unexpectedly shuts
down, and the LEDs on the
operator information panel are
not lit.

Serial port problems

• Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
• If an action step is preceded by '(Trained technician only)', that step must be performed only by a Trained
technician.
• Go to the IBM support website at http://www.lenovo.com/support to check for technical information,
hints, tips, and new device drivers or to submit a request for information.
Table 29. Serial port problems and actions
Symptom
The number of serial ports that
are identified by the operating
system is less than the number
of installed serial ports.
A serial device does not work.
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System x3500 M5 Installation and Service Guide
Action
4. Replace the following components one at a time, in the order shown, restarting
the server each time:
a. DIMMs
b. (Trained technician only) Power switch connector
c. (Trained technician only) Power backplane
d. (Trained technician only) System board
5. If you just installed an optional device, remove it, and restart the server. If
the server now starts, you might have installed more devices than the power
supply supports.
6. See "Power-supply LEDs" on page 137.
7. See "Solving undetermined problems" on page 158.
1. Determine whether you are using an Advanced Configuration and Power
Interface (ACPI) or a non-ACPI operating system. If you are using a non-ACPI
operating system, complete the following steps:
a. Press Ctrl+Alt+Delete.
b. Turn off the server by pressing the power-control button for 5 seconds.
c. Restart the server.
d. If the server fails POST and the power-control button does not work,
disconnect the power cord for 5 seconds; then, reconnect the power cord
and restart the server.
2. If the problem remains or if you are using an ACPI-aware operating system,
suspect the system board.
See "Solving undetermined problems" on page 158.
Action
1. Make sure that:
• Each port is assigned a unique address in the Setup utility and none of the
serial ports is disabled.
• The serial-port adapter (if one is present) is seated correctly.
2. Reseat the serial port adapter.
3. Replace the serial port adapter.
1. Make sure that:
• The device is compatible with the server.
• The serial port is enabled and is assigned a unique address.