use a propane cartridge for filling a cigarette lighter and spray it underneath a display and it will slowly eat adhesive and will make your lcd free like a bird. :-D
beware! dont spray it on any other electronic parts or it can be disasterous.
butane will eat adhesive but not a foam which you must replace but dont know where to find it. i just used ESD protective textile to replace foam. and some industrial adhesive.
simple: just dont open it! :-D it can be really messy to put together.