Be very careful with this
he presumes the voltage regulator has blown in such a way that its not putting out any voltage, This is not always the case, often a damaged regulator will output a random voltage.
You should remove d1 from the ramps to stop any voltage going into the voltage regulator (under X and Y stepper driver module)
You would use + and - pins of the endstops if you where using these to supply 5v to the ramps and mega.
I would just power it over USB myself, either from a pc or a 5v 1amp power pack (one of those with a usb plug on the back, so you can just move the usb cable from pc to power pack as needed)
he presumes the voltage regulator has blown in such a way that its not putting out any voltage, This is not always the case, often a damaged regulator will output a random voltage.
You should remove d1 from the ramps to stop any voltage going into the voltage regulator (under X and Y stepper driver module)
You would use + and - pins of the endstops if you where using these to supply 5v to the ramps and mega.
I would just power it over USB myself, either from a pc or a 5v 1amp power pack (one of those with a usb plug on the back, so you can just move the usb cable from pc to power pack as needed)