When uploading blink, I get.
avrdude: Version 6.3-20171130 Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/ Copyright (c) 2007-2014 Joerg Wunsch System wide configuration file is "C:\Users\patwi\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino14/etc/avrdude.conf" Using Port : COM4 Using Programmer : arduino Overriding Baud Rate : 115200 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x06
I have tried many fixes I've seen online, and the Loopback test works. I originally discovered that the bootloader was missing/corrupted because the "L" light did not blink when pressing the reset button.
I was able to burn the bootloader with avrdude through linuxgpio on a Raspberry Pi 3 B. The "L" light now blinks when powered on and when reset, but I am still getting the error seen at the top of the post. Any suggestions?
Note: I am using an older version of the IDE as part of my troubleshooting. I will be happy to post my results with the latest version if anything changes using suggestions from replies to this post.