Geeetech

Now I just need to figure out which part of the firmware lol. I hate being a noob and having to ask lol.
I have tried changing several parts of it and still no joy.

Awesome, thank you so much, I'll give it a go. This printer has been in a cupboard for almost a year gathering dust because I haven't been able to figure out how to fix it.
Will the standard pro b firmware work, or will I need the pro c dual extruder firmware?

I seem to have broken port one for my hotend in my geeetech prusa i3 pro b gt2560 board, the left side screw port is broken and lose, resulting in my hotend not heating up.
After searching online on if there is a fix I came across a forum which claims I can switch hotend/extruder port 1 with the ...