Cordless Logitech Trackball Quit

[The T Man]

I am a newbe and I am looking for some suggestions on a potential fix for my wireless trackball. I had this wireless and it failed about a year ago. I bit the proverbial bullet and bought a new one. Now I have a need for a second wireless mouse and want to try and fix this one. As stated, I do have a working one and I wanted suggestions on what to swap-out first? Are the LED's prone to failure? Thanks in advance for any and all suggestions....