If Your Keyboard Does Not Work; If Your Mouse Does Not Work; If Your Printer Does Not Work - HP PL Class 450/500/550/600/650/700/750 User Manual

Troubleshooting Your HP Visualize Linux Workstation
If Your Workstation Has a Hardware Problem
standard is required. Also check your display manual to find out which
refresh rate is required. Use your operating system's procedures, to
select the correct refresh rate.

If Your Keyboard Does Not Work

• Ensure that the keyboard is correctly connected (a keyboard icon will
be displayed on your screen if the keyboard is not connected).
• If you turn on your Workstation, the operating system boots, and the
keyboard is correctly connected but still not available, the power-on
password may be set to "keyboard locked". You will need to enter a
password to unlock the keyboard and mouse. You can change this
setting in the Setup program. Refer to the Power Menu in the HP
Setup program.

If Your Mouse Does Not Work

• Ensure that the mouse is correctly connected.
• Clean the mouse ball and rollers as shown in the figure below (use a
non-residual contact cleaner).
Cleaning the mouse rollers

If Your Printer Does Not Work

• Make sure the printer's power switch is ON.
• Verify that the power cord is plugged into the power outlet and the
printer.
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Cleaning the mouse ball
Chapter 3