Acer 4200 notebook unresponsive keyboard and touchpad.. after a mandatory update the keyboard and touchpad are unresponsive.. keyboard only responds if its not shut down properly.. once computer loads and windows vista comes up it stops working all together

The touchpad on the Acer Aspire is built into the notebook itself, which makes the device much harder to troubleshoot or replace. While you can connect a universal serial bus mouse to the notebook if the touchpad becomes unresponsive, attaching any external device reduces the notebook's portability. Although hardware failure can cause the touchpad to stop working, most device-related problems are due to software settings or other conflicts.

Hardware Conflict
Peripheral devices connected to the Aspire can interfere with the integrated touchpad. Disconnect all of the external devices, except for the power adapter, that are connected to the Aspire; then restart the computer. Test the touchpad after booting into Windows. If the touchpad responds, a hardware device is interfering with the pointing device. Reconnect each device one by one to the notebook, testing the touchpad throughout. If the pointing device stops responding after connecting a particular device, the component is interfering with the touchpad. Go to the device manufacturer's website and look up the product model. Check the bulletin board to see if the manufacturer has posted a notice or update addressing issues with device conflicts. If no such update is available, download the latest driver for the component and install it on the computer. b> Disabled Touchpad b> The Acer Aspire 5516 comes with a preset group of keyboard combinations, called hotkeys, that are used to enable or disable devices, configure sound volume and screen brightness, and control the notebook mode. The hotkeys "Fn" and "F7" turn the touchpad on and off. If the integrated mouse is unresponsive, hold down "Fn" and press "F7"; then test the touchpad to see if the device reactivates. If the touchpad still doesn't work, open Device Manager from within the Control Panel. Expand "Mice and Other Pointing Devices," then right-click the touchpad device. If the touchpad is disabled in Device Manager, you'll see the "Enable" option in the context menu. Click it to turn the touchpad back on; then restart the computer. Corrupt Driver b> Windows Vista talks to the touchpad through a program called a device driver. The driver enables Windows Vista to "see" the touchpad and send it instructions. Once the driver communicates these instructions to the touchpad, the touchpad informs the processor that it needs to perform a task, and a specific set of code is performed. If the driver for the touchpad is outdated or corrupt, or if the driver isn't compatible with the OS -- Acer offers touchpad drivers for Windows XP and Windows 7, but these drivers won't work with Windows Vista -- the touchpad becomes unresponsive. Expand the "Mouse and Other Pointing Devices" section from within Device Manager; if Windows detects a problem with the driver, it places a yellow exclamation point or red "X" next to the device. Double-click the touchpad driver to see the error message; then look up the message on the Microsoft Support website for further assistance. b> Touchpad Settings b> Mouse Properties, accessed through the Control Panel, contains several different configuration settings that can alter how the touchpad behaves on the Aspire 5516. On the "Device Settings" tab is the option "Disable Internal Pointing Device When External USB Pointing Device Is Attached." As the option states, if an external mouse is connected to the Aspire 5516, the touchpad will stop working; disable this option if you're using an external pointing device. Clicking the "Settings" button opens the "Properties for Synaptics Touchpad" window. On this screen are the "PalmCheck" and "Touch Sensitivity" options. If PalmCheck is set too high, or Touch Sensitivity too low, the touchpad won't respond to normal touch, making the device seem unresponsive. Hope this helps.

b>

To fix an unresponsive touchpad on your laptop, reactivate it by using the Function key on the keyboard and the Fn key.

This process is different for each computer manufacturer.
If unsure which Function key enables and disables the touchpad, try each one at a time and then
attempt to use the touchpad after each one.

A...Locate the "Fn" key of the laptop keyboard.
The "Fn" key has different colored text or the key is a different color.
B...Locate the function (F1 through F12) key at the top of the keyboard that disables or enables the touchpad on the laptop.
The key typically has an icon that resembles a touchpad with a finger touching it or a touchpad with a diagonal line through it.
C...Press both the "Fn" and touchpad Function key at the same time to reactive the touchpad on your laptop.
Move your finger along the touchpad to verify that it works. Press the combination at any time to disable the touchpad again

Hi,

Just check for the key combination on your keyboard (ex. Fn + F4 or F5..depends on the what key was designed for the touchpad), the touchpad might be locked.

If it is not locked, reinstall the touchpad driver, but it this still doesn't work, boot to Safe Mode to check if it does. Touch pad still not responding in Safe Mode would mean hardware failure.

Hope this helps.

A replacement keyboard is quire cheap and that, if the liquid didn't get to the motherboard, will fix your laptop.
Check out ebay for prices and suppliers.

If you have a wired mouse around, you can plug that in, and use it to navigate to the control panel. In Mouse settings, you can re-enable touchpad.
Alternatively, some of the Travelmates have a keyboard shortcut to enable touchpad, Function-F7.
I hope one of these solutions helps!

Hello,

I recommend going to Acer's support site and downloading the updated drivers for the mouse/touchpad. This should restore your functions.

Good Luck
C2Solutions

in my opinion. your touchpad driver is defected by virouse /re install once time it, second your computer touch pad hardwere is damage,check it using by another keyboard and mouse. then u can get result --thanks

please replaced the laptop ,other option u r put the button & clean the button

go to the computer hardware point or servicestation.

have you tried updating the driver
or go to control panel and mouse and check the settings in there
does your laptop work with a normal mouse