Other than sending it in to a service center, no.

One thing to be careful of though, sometimes when a switch breaks off, it also damages stuff inside, and you get intermitent contact, which can cause that channel or function to change "on it's own". If you keep using the TX with out getting that swtich fixed, be sure to disable anything that might use that switch. And frankly, I wouldn't suggest using the TX at all until you get it fixed.