sure.

You can attach an external display. Or turn it into a small home server

ultra low profile headless server with built in UPS? Heck yeah!

If you have an external monitor, turn it into a halftop.

If you run any services (jellyfin / a media server, torrents, document storage, etc), have them run on it.

Yes, you and a group of your closest friends could have a grand ole time at the local park playing Frisbee with it.

The way I see it, it's basically downgraded to a desktop (assuming it has a separate display output). People use laptops like that as desktops and even home servers all the time.

The two major things to look out for is you probably want to configure it so that closing the lid doesn't put it to sleep, and if possible, detach the battery and just run it off the charger to prevent the battery from puffing up from being constantly charged.

Hell, detach the screen entirely and you basically have a DIY modern Commodore 64.

It depends on why it stopped working. If the display doesnt work because it got dropped chances are other parts of it are broken as well.

Assuming everything else is functioning properly and it has an HDMI/VGA/DVI etc, than it can be connected to an external display.

Replacing a display in a laptop is a routine operation for IT companies hardware teams. So it should be easy to find a shop that replaces the display.

i have a macbook pro from 2019 and the display has some defect and all the colors are inverted. i installed ubuntu and used it as a desktop for awhile.

u might be able to buy the display cheap and fix it. I've previously bought the same model on ebay

I used a laptop with no screen and no harddrive for a while, mainly for presentations during teaching. The laptop plus a usb with linux and the pdf on it, hook it up to the projector. Worked fine. I think I also stripped if from most of the ram.

As useful as any mini PC. Unless it's one that refuses to boot without a working battery or requires you to jump through hoops to get display out blindly.

Self-hosting aside, I had one during the work-from-home times. I wanted to easily move my setup from room-to-room, but not worry about the built-in screen being in the way of my nice monitors/CRT/TV or ruining the battery by leaving it plugged in all day.