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9. TROUBLESHOOTING
(15) Mouse input is not accepted, or the cursor or a button does not work normally.
Possible cause
The mouse does not work properly due to dust or dirt on the mouse, there is a problem with the cable
connection, or the mouse has failed.
Action
1. If you are using an optical mouse, check the following items:
i) Check whether dust or dirt is clinging to the optical sensor. If dust or dirt is present, clean it off.
ii) Do not use an optical mouse on glass, a mirror, or a shiny material. (We recommend using a mouse pad
designed for use with an optical mouse.)
2. If you are using a mouse that is not an optional component provided by the manufacturer, see the manual for the
mouse for information about how to use it.
3. Disconnect the mouse interface cable and securely reconnect it to ensure a stable connection.
4. Replace the mouse with another mouse to check whether the latter works.
5. If you are using a USB KVM switch, read the user's manual that comes with the USB KVM switch. The problem
might be alleviated if you change settings such as emulation settings.
6. If the OS starts while a serial port is receiving data, use the serial port after the OS starts instead, and check
whether the problem goes away.
(16) A USB device (other than a keyboard or a mouse) cannot be recognized or does not operate properly.
Possible cause
There is a problem with the cable connection, or the device driver for the USB device has not been installed.
Action
1. Disconnect the cable for the USB device and securely reconnect it to ensure a stable connection.
2. Replace the cable for the USB device with another cable.
3. If the USB device requires the installation of a device driver, install the device driver by referring to the
manual of the USB device, and then restart the equipment.
4. If the USB device requires an external power supply, make sure that the power cord of the USB device is
plugged in.
5. If the USB device uses USB bus power, make sure that the current consumption of the USB device does not
exceed the specified maximum current for the USB port of the equipment. (See 5.1 (9) Maximum current
specifications.) If the USB device can accept an external power supply, connect the device to an external
power supply.
6. If steps 1 through 5 do not resolve the symptom, a failure of the USB device might be the cause. Take action
by referring to the manual of the USB device.
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