I'm using a megatronics 2.0 board with the REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER. Today, I started getting an error when trying to connect to the printer.

start
echo: External Reset
Marlin1.0.2
echo: Last Updated: Jun 27 201620NOV201514:29:43 | Author: (Alex Mitchell, default config)
Compiled: Jun 27 2016
echo: Free Memory: 3370 PlannerBufferBytes: 1232
echo: Hardcoded Default Settings Loaded
echo: Steps per unit:
echo: M92 X79.74 Y80.35 Z4058.77 E98.92
echo: Maximum feedrates (mm/s):
echo: M203 X960.00 Y960.00 Z2.00 E50.00
echo: Maximum Acceleration (mm/s2):
echo: M201 X960 Y960 Z1 E25
echo: Acceleration: S=acceleration, T=retract acceleration
echo: M204 S480.00 T480.00
echo: Advanced variables: S=Min feedrate (mm/s), T=Min travel feedrate (mm/s), B=minimum segment time (ms), X=maximum XY jerk (mm/s), Z=maximum Z jerk (mm/s), E=maximum E jerk (mm/s)
echo: M205 S0.00 T0.00 B20000 X20.00 Z1.00 E20.00
echo: Home offset (mm):
echo: M206 X0.00 Y0.00 Z0.00
echo: PID settings:
echo: M301 P63.00 I2.25 D440.00
echo: SD init fail

I get this error in both pronterface and arduino serial monitor. I don't use an SD card in my printer and I haven't been getting this error. The lcd is responsive but the printer is otherwise lifeless. The hotend and heated bed won't heat up. I can't get a single motor to turn. Any help would be appreciated.

I saw this error on my Mega / Ramps setup once, I wasn't using the SD card either, but I plugged a blank one in and that error no longer showed up. When I saw it, it didn't disable my printer, but could be worth a shot if you have an SD card laying around.

SD init fail is a harmless error that doesn't stop the printer. It means Marlin didn't find a SD card in the LCD.

Two errors that stop printer until they are fixed are: MINTEMP and MAXTEMP. If you're getting one of these, check the thermistor & its connections.

Edited 1 time(s). Last edit at 06/27/2016 04:47PM by stephenrc.