Universal Serial Bus (USB) port problems
v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v See 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).
v If 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 “Monitor problems” on page 136.
EasyLED Diagnostics
Use EasyLED Diagnostics to diagnose system errors. The diagnostics panel is
behind the operator information panel, on the left front of the server. To access the
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 diagnostics panel.
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.
Press the reset button to reset the server and run the power-on self-test (POST).
You might have to use a pen or the end of a straightened paper clip to press the
button.
The server is designed so that LEDs remain lit when the server is connected to a
power source but is not turned on, provided that the power supply is operating
correctly. This feature helps you to isolate the problem when the operating system
is shut down.
142 ThinkServer RD220 Types 3729, 3779, 3797, and 3798: Installation and User Guide
