LCD no longer working

I see this is for V1, but the description acknowledges that V2 came out in 2021 so there must be some awareness of that version, which is what I have. My LCD touchscreen quit working a couple weeks back, after working fine previously. I gave this to grandkids as Christmas present, they live about an hour away, and they were the ones using it when it no longer fired up so they gave it back to old fix-it grandpa. I am pretty good tech DIY guy, so just figured I'd maybe replace the LCD and be good to go (knowing it might NOT be the LCD itself, maybe the board. connectors and power supply all look solid, though). When powered up, the screen lights, or backlights, but just a white/light grayish with no characters or graphics. That's the only way I've controlled the screen, never having used a computer or phone wifi or usb, just always put models on the micro SD card in the computer then move it to the printer. Now trying USB and wifi don't seem to connect either way, although the computer does sense via usb when the machine is powered up/connected by cable. But then neither Cura nor Weedo give me a connection to the machine recognition. Any ideas, fixes, or even where I might find a V2 LCD replacement part that's evaded all my internet searches. Plenty of used V1 machines out there that I could snap up, but that's a different animal without the touchscreen, buttons instead, and I'm just not finding anything V2 anywhere online, other than new machine at TechTitan, I think it is.