How to connect rasberry pi 400 (keyboard) with an element 14 7" Touchscreen display?

When i connect the pi 400 with a monitor or even tv, everything works fine.

I tried to connect the 7" Touchscreen display the same way i connect the keyboard with a normal monitor but the screen does not turn on.

I have seen other tutorial where people normally connect the screen with a normal pi 4 and then the keyboard (pi 400) but, i think there should be a better way to connect the 7" touchscreen with the pi keyboard directly.

The 7" Touchscreen display is this model: https://www.raspberrypi.com/products/raspberry-pi-touch-display/

My raspberry pi 400is this model: https://www.raspberrypi.com/products/raspberry-pi-400/

shabaz over 3 years ago

This is a repeat of your earlier post.

If you don't connect the cable which carries the video connection, how do you expect the video image to work?

As mentioned before, that display uses a flat flex cable that carries the video image, and the Pi 400 doesn't have such a connector.
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Azharkausmally over 3 years ago in reply to shabaz

Is there an adapter or peripheral i can use to connect the Pi 400 with the element14 7" display?
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shabaz over 3 years ago in reply to Azharkausmally

The 'adapter' is the other Pi (non-400 model) that you've seen people use in tutorials as you mention.

The product is sold to fit into non-400 model Pi boards, anything you do beyond that is just experimentation, it may or may not work. You could google for HDMI to DSI adapter boards and try them out if you liked. If you have success (or not) please report back so that others who google for that information can come across your findings.

It doesn't seem like a popular scenario, to want to connect a Pi 400 to a 800x480 resolution display, but I don't know.
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cstanton over 3 years ago

You would need an interim adapter board go go from the DSI connector on the Pi Touchscreen display to the HDMI port on the Pi 400.
The Pi 400 does not break out the DSI interface directly.
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