Vankoy leisure 470 Projector "invalid format" error message

[Georgia D. Citizen]

I am struggling to get my Vankoy leisure 470 projector to work with my Acer Laptop. It worked well the first few times for viewing movies, but one day I tried to project a PowerPoint and suddenly displayed an "invalid format" error message, and never worked again. I am operating with windows 11, and I have tried adju

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