Lenovo 3822, 3821, 3719, 3823 manual Power problems

Power problems

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

vSee Chapter 8, “Parts Listing, TD200x Machine Types 3719, 3821, 3822, and 3823,” on page 237 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 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).
	b.	Reconnect the power cords.
Note: The power-control button
will not function until 3 minutes	c.	(Trained service technician only) Reseat the operator information panel
after the server has been		cables, and then repeat steps 1a and 1b. If the server starts, reseat the
connected to ac power.		operator information panel. If the problem remains, replace the operator
		information panel.
	2. Make sure that:
	v The power cords are correctly connected to the server and to a working
		electrical outlet.
	v The type of memory that is installed is correct.
	v The DIMM is fully seated.
	v The LEDs on the power supply do not indicate a problem.
	v 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 “Power-supply LEDs” on page 88.
	7. See “Solving undetermined problems” on page 124.
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, 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 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.

Chapter 5. Diagnostics 73