I've seen similar issues in the forum, but no real solution.
I have 5 CMOD A7 boards and only 2 of them behave properly.
The other 3 do not accept a program and sometimes disconnect.
I get the following errors;
ERROR: [Labtools 27-3165] End of startup status: LOW
ERROR: [Common 17-39] 'program_hw_devices' failed due to earlier errors.
I have tried:
- many different USB cables
- Different ports on the PC
- Powered USB hubs
- Vivado Lab 2017.2 and 2018.1
- 2 different bitstream files
The boards that work, always works. No matter the cable or USB ports.
Anything else I should try?