HP 18-5021 All-in-One Desktop PC - Manual (Page 17)

Symptom Possible solution
Cursor does not respond
to the arrow keys on the
number keypad
Press num lock on the keyboard to turn off num lock, so that the arrow keys on the number keypad can be
used.
Cursor does not respond
to mouse movement
1. Press alt + tab to navigate to an open program.
2. Press ctrl + s to save your changes in the selected program ( ctrl + s is the keyboard shortcut for the Save
command on most—not all—programs).
3. Repeat step 1 and step 2 to save changes in all open programs.
4. Press the power button to turn off the computer.
5. After the shutdown is complete, disconnect and reconnect the mouse cable to the back of your
computer, and then restart your computer.
Keyboard and mouse (with cable) 11