Here's how players can solve the door shutter puzzle so they can activate the blue and the red scanner at the same time in Poppy Playtime Chapter 4.

You’ll see a pipe above you. Latch your hand to it and ascend up to the roof, then hop into the vent in front of you. Don’t hang around though. Yarnaby will notice as you enter the vent and hop up to ...

Here is our rundown of Poppy Playtime: Chapter 4; its story and ending explained. Warning for spoilers throughout.