EndStop, Heat Bed and stepper driver issue in my prusa i3 (1 reply)

Hello,

I am building Pruisa I3. all the calibration done. but i am facing below issues to complete the build and start printing

1. End Stops not working. when i move to home position it is hitting to End stops and moving further motor will not stop.
wiring and all fine. if edit the firmware (using Marlin)
// #define ENDSTOPPULLUPS // Comment this out (using // at the start of the line) to disable the endstop pullup resistors like tis
EndStops are working but not allowing the motors to move to any direction. it echoing "End stop hit"

2. When i ON the Heat Bed my power supply SMPS is getting OFF. i am using 450W multi cord power supply. which is used for PC

3. One of the stepper motor Driver mallfuctaning when i turn the adjusment screw motor will work but aftersome time it will not, same cycle repeting.

If i fixed above issues with the help of you people i think i can start test printing.

Thanks in advance for help.

Chandru.