HP ProLiant ML370 Generation 4 Reference And Troubleshooting Manual page 174

174 HP ProLiant ML370 Generation 4 Server Reference and Troubleshooting Guide
Slow-moving horizontal lines are displayed
Action: Be sure magnetic field interference is not occurring. Move the monitor
away from other monitors or power transformers.
Mouse and keyboard problems
Action:
1. Be sure no loose connections (on page 154) exist. If a KVM switching device
is in use, be sure the server is properly connected to the switch.
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2. If a KVM switching device is in use, be sure all cables and connectors are the
proper length and are supported by the switch. Refer to the switch
documentation.
3. Be sure the current drivers for the operating system are installed.
4. Be sure the device driver is not corrupted by replacing the driver.
5. Restart the system and check whether the input device functions correctly
after the server restarts.
6. Replace the device with a known working equivalent device (another similar
mouse or keyboard).
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7. Be sure the keyboard or mouse is connected to the correct port. Determine
whether the keyboard lights flash at POST or the NumLock LED illuminates.
If not, change port connections.
8. Be sure the keyboard or mouse is clean.
For rack-mounted servers, check the cables to the switch box and be sure
the switch is correctly set for the server.
For tower-model servers, check the cable connection from the input
device to the server.
If the problem still occurs with the new mouse or keyboard, the
connector port on the system I/O board is defective. Replace the board.
If the problem no longer occurs, the original input device is defective.
Replace the device.