Geeetech

this error definitely is a wiring issue
if you want to get the wiring sorted out easily, check my documentation

https://3dprinting.odoo.com/burn-a-bootloader-1

my experience with it for mechanical and connection part

https://3dprinting.odoo.com/mechanical

https://3dprinting.odoo.com/hot-end-assembly

I have produced a guide to do this without messing up the board trying soldering...
follow this and it is very simple
cheers
bernard
https://3dprinting.odoo.com/burn-a-bootloader-1

I have done some research to find a better and easier way to burn the bootloader.
The idea is to disconnect the cable to the LCD and use it to connect to the board directly from the Arduino
So here is my solution with loads of pictures
https://3dprinting.odoo.com/burn-a-bootloader-1

bernard

I have the same error and I have not seen any resolution any idea what can be done now? Arduino: 1.8.13 Hourly Build 2020/03/09 12:12 (Mac OS X), Board: "Arduino Mega or Mega 2560, ATmega2560 (Mega 2560)" Error while burning bootloader. avrdude: Yikes! Invalid device signature. Double check connecti...

ok, I found where the 4 plugs were going, in fact I had to remove some with the previous cable and I had not seen it
last problem is the 4988 part which I do not install, maybe it is not needed as I have a more recent board

hi, thanks for your reply
I have the V3.1 board, it has the part soldered already
now I have a cable with 4 additional plus I don't know where to connect, there is no wiring diagram...
2 are marked 3DT, 1 has E1 and E0
ALso the part A4988 not sure what to do with it...

I bought and received the kit from A10 to A10M this is definitely not for the beginner... there is no real user guide included, only 2 diagrams for the mechanical parts, which you can figure out, then you have a picture of the main board and you need to set things on it, not sure if you need solderi...