I have a HL 6.1S board in my T-72 that hasn't gone more than about 4 battle days and now it won't fire the IR LED or trigger the servo recoil. All other functions work. I've swapped IR LEDs and servos and still nothing. I can't swap in a different board as I don't have another HL 6.1 or 7.1 to swap in. I'm troubleshooting some weird issues with my TCB boards now when it won't drive forward or reverse, but will do a neutral turn. The only boards I haven't had issues with yet are my Clark TK40s, 50s, and 80s... I guess we can't win these days. I'm about to swap the Tamiya electronics back in my KV-2 and pull the TCB out of it. Still need to do more testing with the TCBs to see what the issues are.