Lenovo 6446, 6447, 6445, 6444 manual Serial port problems

vFollow the suggested actions in the order in which they are listed in the Action column until the problem is solved.

vSee the parts listing in the Hardware Maintenance Manual to determine which components are customer replaceable units (CRU) and which components are field replaceable units (FRU).

vIf an action step is preceded by “(Trained service technician only),” that step must be performed only by a trained service technician.

Symptom	Action
The server does not turn off.	1. Turn off the server by pressing the power-control button for 5 seconds.
	2. Restart the server.
	3. If the server fails POST and the power-control button does not work, disconnect
	the power cord for 20 seconds; then, reconnect the power cord and restart the
	server.
	Attention: In a dc power environment, only trained service personnel other
	than Lenovo service technicians are authorized to connect or disconnect power
	to the dc power supply. See the documentation that comes with each dc power
	supply.
	4. If the problem remains, suspect the system board.
The OVER SPEC LED on the	See the power troubleshooting table in the Hardware Maintenance Manual or call
light path diagnostics panel is	for service.
lit, and the one of the power
channel LEDs on the system
board is lit.
The server unexpectedly shuts	See “Solvingundetermined problems” in the Hardware Maintenance Manual.
down, and the LEDs on the
operator information panel are
not lit.

Serial port problems

vFollow the suggested actions in the order in which they are listed in the Action column until the problem is solved.

vSee the parts listing in the Hardware Maintenance Manual to determine which components are customer replaceable units (CRU) and which components are field replaceable units (FRU).

vIf an action step is preceded by “(Trained service technician only),” that step must be performed only by a trained service technician.

Symptom	Action
The number of serial ports that	1.	Make sure that:
are identified by the operating
		v Each port is assigned a unique address in the Configuration/Setup Utility
system is less than the number		program and none of the serial ports is disabled.
of installed serial ports.
		v The serial-port adapter (if one is present) is seated correctly.
	2.	Reseat the serial port adapter, if one is present.
	3.	Replace the serial port adapter, if one is present.

Chapter 5. Solving problems 75