RUMBA + Marlin + SD cards.
Way back in pre-history, I had a RUMBA powering a 3DR printer. While reaching up, upside down, in the darkness to fiddle with it, I shorted something and let the smoke out.
I replaced the board, hooked it up to the LCD and, related or not, couldn’t read anything off the SD card. I chalked it up to the LCD being partially nuked in the power event and ignored it as I was playing with Octoprint.
Fast forward to today, the RUMBA has a fresh install of Marlin, a new full-graphic LCD controller…and no SD support. By now everything is new, which makes me think the original SD support issue was a missing jumper, or a setting in Marlin, or something.
The only obvious think is a “echo:SD init fail” on bootup, and I’ve got another RAMPS system that reads cards perfectly, so it’s not an SD card format issue.
SDSUPPORT is defined in Marlin, I’ve attached the jumper settings. Due to it’s expected future life, this printer REALLY needs a working SD card slot…any suggestions I might have missed?
Edited to add: Card insert/remove events ARE detected.