Dell inspiron 6400 keyboard is not working

Try going to Control Panel - Hardware and sound - mouse. Once you have the menu for the mouse open, go to device settings. Click settings, and all of the advanced controls for the functions of your mouse pad can be found there.

If the issue is with the touchpad, I recommend you to uninstall and reinstall touchpad drivers to resolve the issue
Visit the below link for more information
http://notebook-solutions.blogspot.com/2009/07/how-to-uninstall-and-reinstall-touchpad.html

If your new adapter is not compatible with your Acer Aspire in voltage and current, your laptop maybe can't work well. Check your new adapter and ensure if it is the same with the original adapter.

sounds like your main battery needs replacing,move your mouse over the battery icon in the system tray(by the clock),to see if the battery is charging. If it is battery needs replacing. This can cause all kinds of strange issues .

Hello, my best solution would be to check ebay and order one there. If you are familiar with removing the power button bezel, do so and remove the keyboard as well. Then check the connection for the mouse. Its a small little ribbon cable coming from the mouse area.
Here is a direct link you can get these parts from:
http://computers.search.ebay.com/Dell-Inspiron-6400-touchpad_For-Laptops-Notebooks_W0QQcatrefZC6QQcoactionZcompareQQcoentrypageZsearchQQcopagenumZ1QQdfspZ32QQfromZR2QQftrtZ1QQftrvZ1QQsabfmtsZ1QQsacatZ158885QQssPageNameZRC0022QQ_trksidZp1638Q2em120

I hope you have a great day, Please rate my solution.

do you have a mouse plugged into your laptop? It could be either a power setting or a mouse/touchpad setting.

Click on the start menu and select "Control Panel". Once in the control panel, select "Hardware and Sound". Once in the hardware and sound menu, click on "Mouse". Once the mouse menu comes up, there should be a tab labeled "Dell Touchpad". Click on that tab and then click on the large touchpad icon to take you to the touchpad options. Once in the touchpad options menu, click on "Device Select". Once you click on deivce select you should see the option to "enable" or "disable" the touchpad.

Go to control panel and Mouse settings. Make sure settings are set up correctly. Same place for the Touchpad.

i cant figure out how to turn on the croll for my inspiron 6400 touch pad

my toch pad dont work when my laptop is charging i have inspiron 1525