Lenovo 6447, 6446, 6445, 6444 manual Symptom, Hardware Maintenance Manual

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 power-control button does	1. Make sure that:
not work, and the reset button
	v The power cords are correctly connected to the server and to a working
does work (the server does not	power source.
start).
	Attention: In a dc power environment, only trained service personnel
Note: The power-control button
	other than Lenovo service technicians are authorized to connect or
will not function until 20
	disconnect power to the dc power supply. See the documentation that comes
seconds after the server has
	with each dc power supply.
been connected to power.
	v The type of memory that is installed is correct.
	v The LEDs on the power supply do not indicate a problem.
	v The microprocessors are installed in the correct sequence.
	2. Make sure that the power-control button and the reset button are working
	correctly:
	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.
	a. Disconnect the server power cords.
	b. Reseat the operator information panel assembly cable.
	c. Reconnect the power cords.
	d. Press the power-control button to restart the server. If the button does not
	work, replace the operator information panel assembly.
	e. Press the reset button (on the light path diagnostics panel) to restart the
	server. If the button does not work, replace the operator information panel
	assembly.
	3. 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.
	4. Reseat the power backplane and restart the server.
	5. Replace the power backplane and restart the server.
	6. Replace the following components one at a time, in the order shown, restarting
	the server each time:
	a. Power supplies
	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 and to remove and install the dc
	power supply. See the documentation that comes with each dc power
	supply.
	b. (Trained service technician only) System board
	7. See “Solvingpower problems” and “Solvingundetermined problems” in the
	Hardware Maintenance Manual.

74ThinkServer RD120 Types 6444, 6445, 6446, and 6447: Installation Guide