There is a loose part inside my projector. I noticed it while unboxing it. The auto-focus seems to work okay, but I cannot get the 4 corner correction to work at all, i have only used the projector with the Amazon Prime Video app. The vertical keystone correction works well enough, but can’t get the left-right correction to work at all. 4 corner correction is very important for my needs, i’m not sure if the loose part is related to the fact that the 4 corner correction doesnt work, or if im doing something wrorg.
Otherwise I’m pretty happy with the projector. Please let me know if I should send the unit back for exchange.