Lenovo 6444, 6447 Universal Serial Bus USB port problems, Video problems, Light path diagnostics

Universal Serial Bus (USB) 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
A USB device does not work.	1.	Make sure that:
		v The correct USB device driver is installed.
		v The operating system supports USB devices.
	2.	Make sure that the USB configuration options are set correctly in the
		Configuration/Setup Utility program menu (see the User Guide for more
		information).
	3.	If you are using a USB hub, disconnect the USB device from the hub and
		connect it directly to the server.
	4.	Move the device cable to a different USB connector.

Video problems

See “Monitorproblems” on page 71.

Light path diagnostics

Use light path diagnostics to diagnose system errors. The light path diagnostics panel is behind the operator information panel, on the left front of the server. To access the light path diagnostics panel, slide the release latch on the front of the operator information panel to the left.

The following illustration shows the controls and LEDs on the light path diagnostics panel.

	Light Path
	Diagnostics
	OVER SPEC	PS1	PS2
REMIND	CPU	VRM	CNFG
	MEM	NMI	S ERR

SP DASD RAID

FAN TEMP BRD

PCI

To acknowledge a system error but not take immediate action, press the remind button to place the server in Remind mode. When the server is in Remind mode, the system-error LED on the front of the server flashes. If a new failure occurs, the system-error LED is lit again.

Chapter 5. Solving problems 77