Ended up being a bad Arduino board. The pins had issues (manufacturing defect). Ordered a new Ramps/Arduino combo, works fine with ALL of these cards:by ZeroedByte - RAMPS Electronics
My savior! Thank you so much!by ZeroedByte - Firmware - Marlin
I tried disabling SDCARD_CONNECTION, still no luck. As far as the SD cards I've tried: 4GB Lexar SDHC class 4 1GB Walgreens Photo SC card 8GB SP SDHC class 4 32GB SanDisk Ultra SDHC class 10 Are there any go-to SD cards that are known to be compatible?by ZeroedByte - RAMPS Electronics
I'm having a rough time with getting my machine to read from an SD card. It's a Ramps 1.4 shield on an Elegoo MEGA 2560 R3 board, using a RepRapDiscount Smart Controller LCD/SD Combo (model 2004a). I've got the display to work, I can navigate fine, everything was going smoothly until I tried my SD card slot. I'd enabled ' #define REPRAP_DISCOUNT_SMART_CONTROLLER ' and ' #define SDSUPPORT', as wby ZeroedByte - RAMPS Electronics