Serial port problems

	Symptom	Action

	The power-control button does	1. Make sure that the power-control button is working correctly:
	not work (the server does not	a. Disconnect the server power cords.
	start).	a. Disconnect the server power cords.
	start).	b. Reconnect the power cords.
	Note: The power-control	b. Reconnect the power cords.
	button will not function until	c. (Trained service technician only) Reseat the operator information panel
	3 minutes after the server has	cables, and then repeat the above two steps. If the server starts, reseat the
	been connected to ac power.	operator information panel. If the problem remains, replace the operator
		information panel.
		2. Make sure that:
		• The power cords are correctly connected to the server and to a working
		electrical outlet.
		• The type of memory that is installed is correct.
		• The DIMM is fully seated.
		• The LEDs on the power supply do not indicate a problem.
		• The microprocessors are installed in the correct sequence.
		3. Reseat the following components:
		a. DIMMs
		b. (Trained service technician only) Power switch connector
		c. (Trained service technician only) Power backplane
		4. Replace the following components one at a time, in the order shown, restarting
		the server each time:
		a. DIMMs
		b. (Trained service technician only) Power switch connector
		c. (Trained service technician only) Power backplane
		d. (Trained service 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 “Solving undetermined problems” on page 93.

	The server does not turn off.	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, do the following:
		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 the 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.
		2. If the problem remains or if you are using an ACPI-aware operating system,
		suspect the system board.

	The server unexpectedly shuts	See “Solving undetermined problems” on page 93.
	down, and the LEDs on the
	operator information panel are
	not lit.

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

90ThinkServer Installation and User Guide

4011, 1043, 1044, 4010 specifications

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Lenovo 4011, 1044, 4010, 1043 manual Serial port problems

Models: 4011 1043 1044 4010

Symptom