TAG MIL-BOOK 200 Series - Manual (Page 117)

8-8 Troubleshooting
Make sure that the device connected is using an equivalent speed.
Make sure that the IrDA Fast Infrared Port is set to HP
HSDL-2300/3600.
Make sure that the IR port is set correctly in the SCU program.
If you are printing to an infrared printer, make sure that the
appropriate driver is installed.
If you are using any file transfer functions, make sure that both the
computer and the IR device have the appropriate software running.
Make sure that there is no device radiating infrared rays, such as
remote-controlled devices or wireless headphones, near the computer
or device.
Make sure that no direct sunlight or fluorescent lamps are near the
computer or device.
Make sure that the IR ports are clean.
Keyboard, Mouse and Touchpad Problems
The keyboard does not respond.
Try connecting an external keyboard. If it works, contact an
authorized dealer, as the internal keyboard cable might be loose.
The numeric keypad is disabled.
Make sure that Num Lk is switched on. (Check if the Num Lock
Indicator glows or not.)
The external keyboard does not work.
Make sure that the keyboard cable is properly connected.
The USB mouse does not work.
Make sure that the mouse cable is properly connected.
The touchpad does not work, or the pointer is difficult to control
with the touchpad.
Make sure that the touchpad is clean.