Lmc hardware version error and lmc opendriver fail

When you use JCZ marking machine software, you will often encounter these two prompts, 

Lmc hardware version error and lmc opendriver fail

we have found the latest solution, and it works very well. 

1. Replace the USB cable. 

2. Machine grounding. 

3. Check if the card is damaged. 

If you can't solve the problem after trying the above three methods, please follow our new method: 

Please short the C903 on the board.