I flashed the new mega with the exact same version of your firmware that was working perfectly prior to my mega blowing up… No wiring has changed everything was plugged back in the exact same way.
I use the no graphic lcd version of your firmware. I have a second folder with the edits done for the laser. Everything was working 100% until I plugged the laser driver power in backwards as leo mentioned earlier.
Its really weird how the 2 mega boards are behaving differently although the firmware is identical.
Will see what happens when the new ramps arrives tomorrow. Start back from square 1… I just hope it didnt damage this new mega board too.