I have an Eleksmaker Pro A3 and it will no longer connect to any engraver programs including Lightburn. I’m using a Windows 11 tablet and it recognizes COM3 but still no connection. I don’t know if it’s the Nano chip or the mana board. Any troubleshooting tips are appreciated.
Thanks!
If you connect via LaserGRBL or Arduino IDE, do you get any serial output?
No output at all from either. Lightburn “waiting for connection”, LaserGRBL “cant connect”, Arduino " board not recognized"
Then only the USB chip might be working. What does the board look like? Is there any ISP port available? Then you could flash without using USB connection.
Thanks for the info, but I’m afraid that’s a bit beyond my expertise. 
Is the arduino soldered to the mainboard? Otherwise remove it from the rest of the board. Then only connect the USB cable and check if the board is recognized then. You can just use the Arduino IDE and upload the “blink” sketch. If this works, you can flash the grbl firmware again. But be aware that you need the configuration for this board, otherwise it will take quite some time to figure out the pins to be assigned… Or do they offer a firmware download?
Removed the chip from the board and still no connection. I guess it’s toast.
Thank you for the help.
You remove the whole nano board itself?
You can pick up another nano board for about about $12 US. You do have to flash it with the proper firmware.
What are your technical abilities? Do you know how to read or flash firmware?
If you can’t connect to the nano, you’re only option is the ISP port, but if it’s one of the other pieces, it may be moot…
Yes, I removed the nano board from the rest of the board and tried to connect to USB but still no connection. As far as technical abilities go, I can use LaserGRBL to flash firmware, but soldering to port connections is beyond my expertise.
Any idea where I can find a nano board? I’ve come up empty on my searches.
Here’s one from Amazon
I don’t know what’s available to flash on the nano, the Arduino IDE should work.
That will include a module (avrdude) that will talk to the Arduino based machine. If you’re ok with computers, then you can probably download/install avrdude on it’s own.
When you plug the nano into your computer, does the device manager show anything?
Device manager shows COM3 and there is a tone when I connect the board. I’ll try avrdude
The tone means it sees the device… Avrdude is for programming micro controllers. I’d see is any other software will actually talk to it.
Lightburn should …
Yes, try that one as well. But unfortunately, the Atmega sits behind a USB driver chip and when the USB driver chip is still working (and he is, probably), then windows will recognize the device as usual, but there is no communication anywhere behind the chip.
I’d also recommend just buying a new Nano, since you also can get them at $3 at some places, so it might not be worth doing all the debugging 
