If the remote and keypad both quit working at the same time you have a receiver problem. The receiver is part of the logic board and that needs to be replaced.

Sure sounds like they have changed the radio frequency. That is the only reason they all would not work.

I have a problem with my liftmaster 1/2 hp. My house was built in 2005 but im not sure what year the opener is, but my remotes do not work and my hard wire button doesnt work but is blinking. My sensors that detect objects in the way still blinks if i put my leg or something in the way but light bulb on the lifter itself doesnt work and it is a good bulb. and i plugged other objects like a fan or charger or something in that outlet on the ceiling that the lifter is plugged in at and it works. when i unplug the lifter the hard wire button light goes out and when i plug it back up it continues to blink still. What do i need to do?

You can replace the logic board, if that's the problem, or work around the whole thing. (And get your $$ back [return] the new useless remote) Google: Skylink GBRM You can get one from Amazon, or closer to home, radio shack may still carry these, sometimes with an outside keypad remote as well. Lots cheaper than a logic board, remote is probably smaller too. What it does is go in parallel with (or replaces) your current wall button, and sends the opener the right signal to open/close down the original copper wires. --No ladders, No taking apart opener, only mickey-mouse work with screwdriver at original inside control button. Here is a link that might be useful: Link to Amazon