We will show you how to remove and replace the hinge cover which houses the power button.
Remove the battery from the bottom of the laptop.
Please click on the following link for further instruction on how to remove the battery. Dell Inspiron 9100 Battery Replacement
Locate the small opening at the upper left of the top blue panel which houses the power button.
Use a spudger to lift up and remove the blue panel.
Locate the black tab at the upper right corner of the keyboard, and gently pull the black tab to the left to disconnect the hinge cover.
You should now be able to completely remove the hinge cover.