radds 1.6 arduino due configuration not working !!!

I just buy few days ago RADDS 1.6 arduino due RADDS lcd 20x4 char
core xy

x, y z, are controlled by 2DM542 with nema 23 , so I took from board only EN , STEP, DIR and GND, increasing high_delay 5, and double_step_delay 2
extruder is controlled by A4988 , is an 0,9 degree from E3D

I try to put repetier 1.0.2 but without success

Problems:
1. After few rewrite firmware LCD begin to show me only strange characters
2. extruder not spinning , no sound like working, nothing ....
3, extruder temp T0 is working (104GT-2) , but bed temp every T1, T2, T3, T4 show me 4 degree fix, I use table temp 0 but without success for EPCOS.
I try to change epcos with another 104GT-2 only for testing and temp become -22 degree also not increasing or decreasing
4. endstop checked with M119 are ok

i saw on youtoube somebody check servomotors in configuration but i don't have something like this
or maybe my arduino due to come with defects ?

any suggestions ?

Edited 2 time(s). Last edit at 07/15/2018 10:55AM by sz3bbylA.

I come back with new info

I think my arduino due is not original

On radds 1.6 I found an circuit closer to display pinout HCT365 2L5E401, i think is an TTL logic for display but i don't know how to test it if is broken or not
I measure circuits for termistors and look ok
if I try to heat nozzle or bed , they are working
temperature nozzle is showing, temp bed remain the same 4 degree
M119 , testing all hall sensors are working show me L or H

The arduino is powered by 12 v, I just tried with an 7.5 v but all remain the same