There is no spring under the buttons. Only a rubber membrane that pushes them back up. Check to make sure there is no grit down in the crack between the button and the faceplate. Use a paint brush or compressed air to blow it out and clean around it. If it still is stuck you may have a deformed membrane. The only way to fix that is to replace the whole audio unit. I had one switch on my 2002 that had a deformation in the membrane that cause this same thing, and I have heard about a couple others. But normally, it's just sand or dirt around the switch and easily remedied.The "ICOM" button on my 06 is partially depressed comapaired to the other buttons. It seams that the spring has sprung............can this be fixed or is this a warranty item??