@Simon-1 Thank's for the reply but i find a firmware who working, ... My first two tries with firmware 3.5 did not work I had a black screen and the second time the colors were weird so I tried version 3.4 which worked the first time but I had the problem with the buttons of the heating room which did not work...
So I decided to retry all the 3.5 firmwares and finally I found one that worked.
I'm just starting out and I'm not very knowledgeable in programming and I just migrated my printer to firmware 3.5.3 a few weeks ago!!
there is a good difference between version 2.5 and 3.5.3...
Currently I am trying to make a trigger to turn on the power supply and turn it off with the same trigger if it is already on...
The heat chamber is solve !!! 