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 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. Run USB diagnostics (see “POST” on page 142).
2. Make sure that:
v The correct USB device driver is installed.
v The operating system supports USB devices.
v A standard PS/2 keyboard or mouse is not connected to the server. If it is, a
USB keyboard or mouse will not work during POST.
3.
Make sure that the USB configuration options are set correctly in the UEFI
Setup Utility program (see “Using the Setup Utility” on page 116 for more
information).
4. If you are using a USB hub, disconnect the USB device from the hub and
connect it directly to the server.
Video problems
See “Monitor problems” on page 151.
EasyLED
EasyLED is a system of LEDs on various external and internal components of the
server. When an error occurs, LEDs are lit throughout the server. By viewing the
LEDs in a particular order, you can often identify the source of the error.
When LEDs are lit to indicate an error, they remain lit when the server is turned off,
provided that the server is still connected to power and the power supply is
operating correctly.
Before working inside the server to view EasyLED LEDs, read the safety
information in “Safety” on page vii and “Installation guidelines” on page 39.
If an error occurs, view the EasyLED LEDs in the following order:
1. Look at the operator information panel on the front of the server.
v If the information LED is lit, it indicates that information about a suboptimal
condition in the server is available in the IMM system event log or in the
system-error log.
v If the system-error LED is lit, it indicates that an error has occurred; go to
step 2.
The
following illustration shows the operator information panel.
Chapter 7. Solving problems 157
