welp. my Viki2 keeps giving me a white screen that i have to change

welp. my Viki2 keeps giving me a white screen that i have to change back manually in contrast setting in its menu. but it keeps coming back.

every boot it starts white.

have to change it back manually

even after changing back manually something simple like an m106 changes it back to white

Firmware settings hi number. low number doesnt matter always will boot snow white.

I have no experience with the Viki2, but I’d check any ground wires if relevant between the MCU and the screen. I’d also see which commands change it back. E.g, is M106 the only thing or do other commands? IDK, just troubleshooting to find more details.

How do you change it back manually?

Click the click wheel go into the control menu and change lcd contrast.

Same as any other lcd.

Ok, I played with AZSMZ display on arduino2560+ramps. It’s the same as viki2 for firmware. Default contrast is 31 but I need to set it to max (63) for good picture. So go to firmare, find and change default contrast.