Geeetech

Hi i have a problem whit my a20 e 3d touch. until yesterday all ok but today the 3d touch not respond....red light fixed (no blu lighting) any command on a20 don't start on 3d touch. i change the 3d touch but the same problem. i have a 4.1 motherboard. is the exention board? Or can i make to solve this problem? any idea?
Thanks
Andrea

please try to reinstall the 3DTouch like the video: https://www.youtube.com/watch?v=4-Zofqk4Mvc&t=3s ?
Especially focus on the wire sequence, like the picture attached.
You can also try to reinstall the firmware, which can be found on the website: https://www.geeetech.com/download.html?download_id=32