Servos do not work (2 replies)

Hi:
I am putting up a printer.
All steppers work.
Trying to setup the Auto Bed Leveling feature of Marlin. 1.1.0
Electronics setup: MEGA 2560 + Ramps 1.4 + A4988 drivers + 2004 LCD

Shorted vcc and 5v pins in Ramps 1.4 board to activate the servo voltage.
When i connect the servo to the servo pins the servo did turn to indicate that the servo pins supply voltage.
But when i give M280 P0 S* where * is between 0 to 180, nothing happens.

The Servo wiring connections are like from edge of the board to inside -ve, +ve, Signal.

What am i doing wrong?
Please help.