Hi I am a newbie and need your help on upgrading my TI Nspire Non-Cas 

I had tried every instruction and it seems what hold me back from successfully implementing Ndless + nlaunchy (both newest version) is the Diag protocol - after installing Ndless, my calc wont load the OS inside the /nlaunch folder 

(I have tried everything, try CAS .tns files in the folder -I use NL.3.1-3.6.Switchpack and 3.2-3.6 ones-, non-CAS .tns files, download and modify .tco, and .tcs file myself using TNOC, rename it into phoenix.tns) if I only copy phoenix files not phoenix.old.tns one it will change into phoenix.old.tns automatically and OS wont load as consequence) 

When Diag screen appear I go into option nomber 0 and test the battery pack, when I restart it continues loading OS but wont succefully load it. (If I dont test battery pack even if I restart it keeps on going into Diag)

why did I get Diag? probably because during Ndless installation I pressed 2 -2 - 0 and then 5-8-0 (this 5-8-0 prioritizes Diag over boot2) I tried Esc+Menu+(-) and it didnt work for me. 

I tried esc+menu+(+) out of desperation it shows bug PP12D on te upper left corner of the screen I dont know what the hotkey means nor what the bug means

the screen stays at loading and won't change even if you wait for hours

it frustates me, because I need CAS program. I dont ask you to provide me info to change non-Cas to Cas if it violates the law or rule in this forum.

I ask you to help me why wont my TI nspire successfully load the program as it should be.

(additional Info, I cant managed to press 2 -delete OS- if I pressed Menu+Enter+EE button, instead I picked 4 -total format- and continue from there everytime)

Huge Thanks everyone