Amazon.com: BenQ TK800 4K UHD Home Theater Projector with HDR | 3000 Lumens for Ambient Lighting | 92% Rec. 709 for Accurate Colors | Keystone for Easy Setup : Electronics
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A line has appeared in the corner of my BenQ Tk-800m image. It's vibrating. Maybe a hair in the projector? : r/projectors