Hello Guzzilazz. At least 8 local members have asked me about this exact problem with their Futaba Transmitters this year alone. I must state I am no electronic expert but I am "handy" and have fixed every one. The problem is the trim switch buttons jam. These are single action momentary switches that are normally "open" (not working). When they jam they go into a normally closed position and allow a live circuit and keep trying to adjust the trim, hence the beep. Isopropyl alcohol (IPA) will, most of the time, release the button , but you need to get to the switch from inside the transmitter. This means dismantling the whole radio. Quite easy, if you take your time, take photos as you go and just be careful not to damage the ribbon cable to the screen. The screen is held to the chassis with its own screws which you get to through the 2 holes in the mother board. You will see what I mean when you open it up. Don't worry about levers and bits falling out, its obvious where they go when it comes to reassembly. When you can expose the switch which looks like a tiny button on the front of the mother board, drop the alcohol into it using a cotton bud and keep pressing the button. It may take a while and you may wonder where all the alcohol is going, but don't worry, its evaporating. Connect the battery, turn the machine on and see if it works, if not repeat flooding and pressing the switch until it does. Carefully put it back together. Good luck