![](/images/backgrounds/288757/hp-laptop-4100-users-manual-54703554x1.png)
Symptom
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Suggestions | Likely Causes | Comments |
PS/2 keyboard and mouse with Y- adapter do not work
Pointing stick
General problems
Check devices separately.
Check settings in Control Panel.
Check that the pointing stick is enabled in BIOS Setup.
PS/2 device.
Motherboard.
Keyboard assembly. Motherboard.
Special TrackPoint driver features not working
If installed, remove TouchPad driver support using Add/Remove Program.
In Mouse Properties, select the IBM TrackPoint driver from the
Keyboard assembly. Motherboard.
Click button doesn’t work
Touch pad
Motherboard.
General problems
Special TouchPad driver features not working
Click button doesn’t work
Audio
Check settings in Control Panel.
Check pointing stick settings in Control Panel. The IBM TrackPoint driver can redefine touch pad operation.
Check that the touch pad is not disabled in BIOS Setup.
If installed, remove IBM TrackPoint support using Add/Remove Program, then in Mouse Properties, select the standard PS/2 mouse.
Disable the pointing stick in BIOS Setup.
Run Setup.exe from the
Motherboard.
Motherboard.
Motherboard.
Sound does not play
Check settings in BIOS Setup.
Increase sound volume (Fn+UP and software controls).
Check whether mute is active (mute button and software controls).
Check for sound resource conflicts.
Speakers.
Motherboard.
Check operation using headphones or external speakers (audio jack PCA).
Troubleshooting and Diagnostics | HP OmniBook 4100 |