Thank you, kolban, for continuing the discussion. I somehow got the "bad" board working with WiFiScan sketch even tho' I got the same error message while uploading. However, it will not work with Blink sketch. With the serial monitor attached via USB, I got the info for both "good" and "bad" boards ...

Thank you, kolban and miemoy, for the replies. Followed both suggestions. Still no go. I exchanged two boards, good and bad, on the same computer with the same sketch. The good one is still good but the bad one is no good. I checked the board info for each and both show up, no issue. In the Device M...

Bought 4 ESP-WROOM-32 boards and tested them with Blink sketch. The first one was passed but the others fail. I got an error message below: Connecting........_____....._____....._____....._____....._____....._____....._____....._____....._____.....____An error occurred while uploading the sketch _ A...