Lenovo 3808, 3836, 3809, 3826, 3724, 3824, 3815, 3817 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 the Hardware Maintenance Manual to determine which components are customer replaceable units (CRUs) and which components are field replaceable units (FRUs).

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 control-panel assembly power-control button is working
not work (the server does not
	correctly:
start).
	a. Disconnect the server power cords.
Note: The power-control button
	b. Reconnect the power cords.
will not function until 1 to 3
minutes after the server has	c. Press the power-control button. If the server does not start, check the
been connected to ac power.	power-control button for damage.

2.Make sure that:

v The power cords are correctly connected to the server and to a working electrical outlet.

vThe power LEDs (ac, dc) are lit correctly.

vThe server power-on LED on the front information panel is flashing after ac power cord is connected and that it stays on after the power-button is pressed.

vThe server contains the correct type of DIMMs.

vThe DIMMs are correctly seated.

vA POST beep code did not sound, indicating a memory initialization error.

vThe LEDs on the power supply do not indicate a problem.

vThe microprocessor is correctly installed.

3.Reseat the following components:

		a. DIMMs
		b. Power-supply cables to all internal components
	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 supply
	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 173.
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 holding 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 ac power cord for 20 seconds; then, reconnect the ac power
			cord and restart the server.
	2.	(Trained service technician only) If the problem remains or if you are using an
		ACPI-aware operating system, suspect the system board.

Chapter 7. Troubleshooting 171