My MacBook Air screen is showing black

I had this issue on my 2017 Mac back in the day. Regardless of the model, the connector between the LogicBoard and the screen. Then connector kept becoming lose. I had to get it serviced 11 times, until I was granted my money towards a new Mac. So, get this serviced. Who is the seller? If Apple, you’ll have to go through Apple, if covered by AppleCare. If not Apple, then see about a return.

Take to an Apple Store:

You'd setup a Genius Bar Appointment at your local Apple Store, taking it in for service. There, it will be diagnosed, and you'll be provided with your options.

Report back if anything here helps...

II. Troubleshooting Mac Power:

A. Black Mac Screen:

• Go Here: If your Mac doesn't Turn On or Start Up - Apple Support
• Using External Devices: Try Resetting the SMC and NVRAM, but this time, using an external keyboard. Connect an external monitor and see if you get an output.

B. Mac Power Issues:

Try a New Charger:

If it is currently charging from a charger, then use a new charger:

• Power & Cables - Mac Accessories - Apple - Select "Mac Compatibility" on the left
• Find the right power adapter and cable for your Mac notebook - Apple Support

C. A Few Links to Refer to for Power:

• If your Mac doesn't Turn On - Apple Support

• How to Turn your Mac On or Off - Apple Support

• About Mac Notebook Batteries - Apple Support

• Charge the MacBook Pro Battery - Apple Support

• If your Mac Battery won't Charge - Apple Support