I got an Arduino Mega with a 3.5" screen 420*320 with drivers ILI9486 and they’re not working properly. I’ve installed UTFT, MCUfriend and others but none of them worked. Would like to use the UTFT because I already got a code for it. So when I put the driver in the code. The screen still being white but in the backround there’s the thing i’m programming. The problem is that when I set the background in black, it’s already white.

Please post a link to the actual screen that you have bought. e.g. Ebay sale

Or post a photo of the pcb side of the display.