Probook 4420s laptop
The keyboard on the laptop will need to be replaced, go to www.ebay.com Type make and model of laptop, refine search to keyboard.
SOURCE: I need a user manual
If you were to log on to the
manufacturer's web site, I think you will be pleasantly surprised as
usually one is able to download, by model number, Customer
Instruction Manuals, list
of Dealers,
for spare parts and service, Driver
downloads
and
Installation Instructions
as required. Just Google the manufacturer's name and
follow the links. Make certain you are directed to the manufacturer's
web site as some search engines direct you to other sites and they
charge for the information that is normally free of charge. I hope this helps.
SOURCE: my ProBook 4420s touchpad is
There can be a few reasons why is not working. To fix your touchpad, follow the information from this link.
SOURCE: I have a HP Probook 4420s, but the DVD-RAM Drive
It sounds like you registry has a bad configuration for your drive. Here's how to test it: This fix has helped me many times, but make sure of the correct registry entry before deleting anything, and do an export before starting (file/export) save it somewhere on your hard drive. If it works for you then you can remove the backup file.
Can you see the drive
listed in BIOS? If you change the boot order to 'CD first' with a
bootable CD inserted, does it boot to the CD or to Windows?
If
it's listed in BIOS but can't be seen in Windows Explorer, go to
Start > Run > regedit. Remove the Upperfilters and
Lowerfilters values from this registry key:
HKEY_LOCAL_MACHINE \
SYSTEM \ CurrentControlSet \ Control \ Class \
{4D36E965-E325-11CE-BFC1-08002BE10318}
Then reboot.
Important:
Make a backup (export) before making any changes to the registry.
SOURCE: how to unlock touch pad
I using Synaptics.......Go to Start, Control Panel, Mouse. Select Device Settings and then Settings. All required options will be there. If no Synaptics then go to the HP web and enter your model of computer and OS , then to software and driver downloads. There you will find the software and drivers required to give full functionality of the touchpad features. If not found there go to Synaptics web site and look for drivers and utilities for your OS version.
HP Link:
http://www8.hp.com/us/en/support-drivers.html
Synaptics Link:
http://www.synaptics.com/solutions/products/touchpad
Hope this helps
SOURCE: I bought new HP probook 4420s, but the brightness
Try pressing it without the Fn key, sometimes it gets switched up. If this doesn't work, try restarting the computer.
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