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Disregard,
Found to be a bad stepper driver.

Also,
I put in the latest Marlin, and am using Repetier Host as my control software.
C

All,
I purchased a GEEETech Prusa i3 thirdhand off CL about 2 months ago. It has the GT2560 board, dual Z axes, single X, Y, and extruder. The heat bed has not worked, but I just set it to 10 deg...