Taurino Power + RAMPS 1.4 Bundle install (Page 2 of 8)

And in the Arduino program, you're set to Com4 in Tools / Serial Port?

Very strange...a stock Marlin profile (with MB 33 selected in configuration.h) should upload seamlessly...

When you open the Marlin.pde file in Arduino, you should see a bunch of tabs across the top:  Marlin, BlinkM...stuff like that.  One of the tabs is configuration.h...click on that and scroll down slightly to #define MOTHERBOARD and it should have a following number (33 in your case).

Save the sketch and try to upload.

That's the one and it is correct...this version of Marlin is slightly different than mine.

Can you jump on Chat for a few min?

OK, try this...disconnect the USB and the power supply plug (do that first), then unplug ALL connectors to the printer.
Then put just the USB back and try the upload...

Try switching your USB cable

I never had to...

Cool!  Look forward to your next post!

You may wish to loosen and remove the drive belts prior to trying to move anything to avoid crashes.  This way, you can at least verify that the pulleys are driving in the right direction when you hit "Home" for a particular axis, and then hit your end stop switch manually to make sure they are working correctly before hooking the belts back up.

EDIT:  You will most likely need to adjust the vrefs on the stepper driver chips for the motors in concert with what is described above.  The vref is the tiny trim pot on each individual stepper driver.  Try to jog an axis for 100mm or so, and then with a non-conductive screwdriver, adjust the pot until the motor runs smoothly and strong without whining.

EDIT: Is ANY plastic oozing from the nozzle at 230?  Can you push the filament and extrude by hand if you take pressure off of the idler bearing?

How about the heat bed?

Can you post a pic of your connections to the board? Also did you install all the jumpers under each stepper driver?