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RepRapDiscount Full Graphic Display Only works from USB power after press an end stop

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Hi there,

I got a new Ramps 1.4 board, Mega controller, Full graphic display and 5 stepper drivers for a Prusa i3 build I am putting together.

I was wiring the motors, hot end and end stops in to the Ramps board and then when I clicked the three end stops, the full graphic display shut off and I could smell a burning smell?

After this happened, the display will only come on after the ramps/mega are plugged in to PC USB power (the controller can be connected to in Repetier).

Can anyone give me any advice on what might have happened? I bought the set off Amazon, the manufacturer is called SINTRON.

Kindest regards,

Nathan

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