Hello everyone,

I´ve tried to connect my bltouch but i had the connector wired wrong so i created a short on the AUX-1 port.
Now the lcd doesnt work anymore but the fans still work. The display only works when i plug in the usb cable to my computer.
How can i fix this problem or what do i have to replace?

Most likly you have destroyed the 5 volt regulator on the arduino

so i should just replace the arduino and thats it?

You could feed 5V from USB or even use a USB charger, when there's no PC near the printer.