Hey all,
The setup was working. I have RAMPS 1.6 with A4988 steppers which I will be using for a CNC machine I'm building. (The Root3 CNC)
I was trying to set the Vref and my voltmeter probe slipped from the GND pin (I realize now that was a very unsafe way to be measuring the voltage) so it ended up between GND and the next pin which seems to be Vcc.
For a fraction of a second there was a bzzzz and a small puff of smoke.
The screen I have connected to the RAMPS board still turns on although its brightness is all the way up now and the marlin firmware runs but none of the drivers do anything.
I am not sure if I burned something on the RAMPS board or the Arduino 2560.
Visually I cannot tell.
Smell-wise I am thinking it is something on the RAMPS but I have no idea what I should check. If it something I can repair I'd like to try that.
P.s. got a new arduino and ramps in the meantime so I can take my time with this but ideas would be appreciated. Thanks in advance.
p.p.s. The arduino now get quite hot on the side between the USB and power jack connector. The new one doesn't Don't remember if the old one was always like that but doesn't seem normal.