Geeetech

Hello, my Geeetech A10 Pro doesn't start up, the display is staying "black" and nothing happens... I opened the cover and just the red led in the upper left of the board is glowing (red) at the moment. Everything is connected correct and no wrong polarity mobdro kodi . Hope someone can help me with ...

Can someone explain why Geeetech says to set the Vref on the A4988 driver to 1.0V. All the drivers on my Pro B acrylic have 0.2ohm (R200) sense resistors and the supplied NEMA17s have a rated current of 1.5A so doing the maths, Vref = 1.5A x 8 x 0.2 ohm = 2.4V, which is outside the adjustment range ...