Serial-Device Problems - IBM System x3850 X6 Installation And Service Manual

Table 50. Symptoms and user actions for power problems (continued)
v Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
v See Chapter 5, "Parts listing, System x3850 X6 and x3950 X6 Types 3837 and 3839," on page 205 to determine
which components are customer replaceable units (CRU) and which components are field replaceable units
(FRU).
v If an action step is preceded by (Trained service technician only), that step must be performed only by a Trained
service technician.
Symptom
The server does not turn off
The server unexpectedly shuts
down, and the LEDs on the
operator information panel are
not lit.

Serial-device problems

Use this information to solve serial-device problems.
Table 51. Symptoms and user actions for serial device problems
v Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
v See Chapter 5, "Parts listing, System x3850 X6 and x3950 X6 Types 3837 and 3839," on page 205 to determine
which components are customer replaceable units (CRU) and which components are field replaceable units
(FRU).
v If an action step is preceded by (Trained service technician only), that step must be performed only by a Trained
service technician.
Symptom
The operating system can not
identify the serial port.
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System x3850 X6 and x3950 X6 Types 3837 and 3839: Installation and Service Guide
Action
1. The server will not power-off using the operating system or the power-on
button, complete the following steps:
a. 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:
1) Press Ctrl+Alt+Delete.
2) Turn off the server by pressing the power-on button and holding it
down for 5 seconds.
3) Restart the server.
4) If the server fails POST and the power-on button does not work,
disconnect the ac power cord for 20 seconds; then, reconnect the ac
power cord and restart the server.
b. If the problem remains or if you are using an ACPI-aware operating
system, replace the standard I/O book.
1. Check the IMM event log for errors and resolve any errors associated with the
device.
2. Check the LCD display panel for other error information.
3. If the problem remains, see "Solving undetermined problems" on page 199.
Action
1. Make sure that:
v Each port is assigned a unique address in the Setup utility and none of the
serial ports is disabled.
v Replace the I/O book.