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Problem with Ramps or full graphic smart controller (no replies)

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Hi,

i have a problem. I think i killed my REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER.

From the beginning: I have a ramps 1.4 with an REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER. It all worked fine so the config.h is correct. But a few days ago i fried my Arduino... I got a new one and all did work fine again. But now i managed to fry my full graphic smart controller. Or the ramps. I wanted to adjust the brightness by adding a resistor between pin 2 and 3 at the controller.

While i did so i exedently touched this pin with either the 3rd pin (contrast) or the 2nd (5V)

Now here is my question. How can i figure out which part i have killed?

The AMS1113 3.3V on the controllerboard is still working. I messured the pins at the display. Its 5 V where it should be and ground where Ground should be. I´m quiet lost. But before i buy anything i want to be sure which part it is i killed. Can somebody please help me?

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