Brain Test 4 Level 428: Worry must turn on this machine.
Brain Test 4 Level 428
Screenshots

Quick Answer
Drag the slide from the left machine onto the display to reveal '1 2 4 5'. Light up 1, 2, 4, and 5 buttons in the respective columns, then pull the lever.
Skills Tested
Step-by-Step Solution
- 1) Find the slide hanging on the left machine.
- 2) Slide it over the display to show 1 2 4 5.
- 3) Tap the buttons for 1, 2, 4, and 5 in those columns.
- 4) Pull the lever to turn the machine on.
Hint
Reveal a hint
Move the slide onto the screen to see the code.
Why It Works
A slide hanging on the machine hides the sequence you need. Covering the display with it reveals 1 2 4 5, and lighting those exact buttons prepares the panel, so pulling the lever switches the machine on.
Frequently asked questions
How do I turn on the machine in Brain Test 4 Level 428?
Move the slide from the left machine onto the display to see '1 2 4 5', light those buttons, and pull the lever.
What is the answer to Brain Test 4 Level 428?
Cross the left slide over the screen to reveal 1 2 4 5, press those numbered buttons, then pull the lever to start it.
What is the trick in Brain Test 4 Level 428?
The correct code is hidden until you move the slide onto the display, which shows the numbers you have to light.
Why do I need the slide in Brain Test 4 Level 428?
The slide reveals the code 1 2 4 5 on the display, telling you which buttons to light before pulling the lever.
Is there a video walkthrough for Brain Test 4 Level 428?
Yes, the video shows placing the slide on the display, lighting 1 2 4 5, and pulling the lever to power the machine.
How do I avoid getting stuck in Brain Test 4 Level 428?
Drag the left slide over the display first to read the code, then light 1, 2, 4, and 5 and pull the lever.