The only connector on an Acer laptop keyboard is a ribbon cable that runs from the back of the keyboard and connects to the top of the laptop. If your Acer Aspire 5920G keyboard isn't working chances are it is the result of a loose connection. You can access the ribbon cable by removing the keyboard itself. This doesn't require much disassembly, and you can complete the process even if you don't know much about computers.
Turn off your Acer, remove the power cord and unplug the battery from its compartment on the bottom of the computer.
Locate the plastic panel just above the Acer Aspire 5920G keyboard and insert the tip of your screwdriver in the gap at the side of the panel. Pry up to remove the panel from the computer.
Remove any screws located above the keyboard and set them aside.
Lift the keyboard up from the top and you will be able to see the ribbon cable that runs from the back of the keyboard to the top of the computer.
Make sure the ribbon cable is plugged securely into the port in the top of the computer. If it isn't simply unplug it and then plug it back in, making sure it is secure in the port.
Fit the keyboard back over the top of the computer and replace the screws and panel.