HRAP3 Help

I’m not sure if this is the right area, but I’m not sure where else to put this.

I recently got 2 HRAP3’s through an EBay auction, one works perfectly fine and the other has the Square button constantly activated. Even if I disconnect the button it still is activated. I was wondering if anyone had any thoughts on what it could possibly be, or some potential fix suggestions.
Also, if it isn’t too much to ask for, does anyone have a wiring schematic for the HRAP3?

Thanks in advance for any help, and again I’m sorry if I posted this in the wrong area.

look for any turbo switches, if its been soldered or something like that before you can check those