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• Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
Chapter 4 "Parts listing, Lenovo System x3550 M3 Type 4254 and 7944" on page 403
• See
components are customer replaceable units (CRU) and which components are field replaceable units (FRU).
• If an action step is preceded by "(Trained service technician only)," that step must be performed only by a
Trained service technician.
• Go to the IBM support website at
tips, and new device drivers or to submit a request for information.
Symptom
All or some keys on the
keyboard do not work.
The mouse or pointing device
does not work.
Memory problems
Use this information to solve memory problems.
http://www.ibm.com/supportportal/
Action
1. Make sure that:
• The keyboard cable is securely connected.
• The server and the monitor are turned on.
2. If you are using a USB keyboard, run the Setup utility and enable keyboardless
operation.
3. If you are using a USB keyboard and it is connected to a USB hub, disconnect
the keyboard from the hub and connect it directly to the server.
4. Replace the following components one at a time, in the order shown, restarting
the server each time:
a. Keyboard
b. (Trained service technician only) System board
1. Make sure that:
• The mouse or pointing-device cable is securely connected to the server.
• If you are using a pointing device, the keyboard and mouse or pointing-
device cables are not reversed.
• The mouse or pointing-device device drivers are installed correctly.
• The server and the monitor are turned on.
• The mouse option is enabled in the Setup utility.
2. If you are using a USB mouse or pointing device and it is connected to a USB
hub, disconnect the mouse or pointing device from the hub and connect it
directly to the server.
3. Replace the following components one at a time, in the order shown, restarting
the server each time:
a. Mouse or pointing device
b. (Trained service technician only) System board
to determine which
to check for technical information, hints,
.
Chapter 3
Diagnostics
367
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