MacBook Pro black display but everything is else is working.

Babycake278 wrote:

MacBook Pro 16” 2019 black screen but keyboard lights and second monitor is working well. I was able to do a system update to macOS Tahoe 26.3.1 (a), but even that did not help main display and is still black screen. Anyone else have an issue and how to fix?

You have a hardware failure—

In or out of warranty you can get a free over the counter 'Apple Service Diagnostics' test /assessment

Make an appointment for a "hardware issue"

Genius Bar Reservation and Apple Support Options - Apple

Outside the USA

Contact Apple Support - Apple Support

see Vintage and Obsolete:

Vintage—Apple will repair if parts are available; Obsolete—no.

Obtaining service for your Apple product after an expired warranty - Apple Support

Obtaining service for your Apple product after an expired ...

I would not spend any real money on an Intel Mac— macOS tahoe is the end of the line for your Intel 2019

If the Mac drives an external display but not the internal, hardware is the likely culprit.

Official Apple Support