XBox 360 Controller button gets stuck or doesn't work all the time.
First review how to open/clean your XBox 360 Controller , here Symptoms: My controller's button works sometimes or after i press it it will stay held down for a while even after I stop touching it. Or my button feels like it is getting hard to press down, sometimes it sticks. Or my button doesn't work every now and again. Fixes for All XBox 360 Controller Buttons. After the controller is completely taken apart locate the button giving you trouble. Clean it thoroughly with rubbing alcohol and a cotton swab or q-tip. Any hard to get grime might be easier to remove with a finger nail as not to damage the button itself. If the button your having issues with is the guide button there is a small clear/black piece that is also part of the button, this needs to cleaned as well. After it's smooth and clean, check the rubber pad it rests on. Notice any grime/filth/muck? Clean it as well using the same methods, even soap and water if it is a big mess. Next we are to the circuit board...