Take the fob apart. Careful not to lose the little steel discs.
Remove all the little switch discs and set them to soak in an alcohol bath to remove any contamination.
Use alcohol to clean the surface of the PC board. If needed, use a pencil eraser to remove any contamination or oxidation.
Wipe off and allow the discs and PC board to thoroughly dry.
Carefully place one little steel concave side down over each used switch target. Note: Many fobs do not have all the switches used.
Place a strip of Scotch Magic Tape to cover all the discs and press down to make sure it adheres to the PC board with all the discs in place.
Trim excess tape from around the PC board.
Assemble the fob. Check each switch to ensure it can be heard operating as you push it. Try the fob.
Thank you. Rich Knowles
Can yo post some pics so we can see what you are facing here iFixitでの質問に画像を追加する方法
You appear to be missing some of the pads! Correction: I count five here two is still in the key and three on the table. You need seven!
The key fob only shows 5 buttons on the front. There are 3 on the table and 2 of them still in the key fob. They look pretty dirty and need cleaned to make a good connection with the board.
Joshua Freeman さんによる