2015-02-04 01:01 AM
Whenever my F3 Discovery board is powered by 5V (no USB) I get a slow red flash on LD2. I can't find any info on what this means. Maybe it just means there's power but no USB?
Thanks for your help, Colin2018-05-30 06:01 AM
Hello,
Blinking LD2 means that there is no communication with PC, so your idea is right. Usually we see it once there is a problem with STLink driver.
Best Regards,
Artur
2018-05-30 06:41 AM
Then check your USB drivers on the PC, try the ST-Link Utility, and perhaps update to a newer (ST-Link) firmware.