[HELP] Microcontroller LCD of Arduino Atx2

I have an Arduino Atx 2

i successfully power on the Microcontroller of the Arduino Atx2 but the lcd is still on black screen

please tell me what should i do to fix it.

-thanks

@Dir, please do not cross-post. Please do not hijack. Other post removed.

huh? sorry sir, but im not hijacking