I know that it can be very difficult to have issues with you microwave. The keypad membrane/control part number can be difficult to find. This part comes in four different colors, so in order to find the right part number you will need to include what color it is. You can find parts at this link:
Sears Parts Direct
. As for the instructions on how to install it, I am sorry but we can not provide that for you. There are several very dangerous components, that can cause bodily harm or even death if they are touch, so I would not recommend that you do this. If you would like to schedule service, just click on this link:
Sears Home Services
. If you need further assistance, please reply to this thread. Thank you for using Manage My Life.