MacBook Pro 2019 16" Internal Screen dosnt work only on Exterlan and dont start

Subject: MacBook Pro 2019 16" Internal Screen Issue – Help Needed

Hi,

My MacBook Pro 2019 16" internal screen has stopped working (the display matrix is damaged). However, it was working fine with an external 16" flat screen via HDMI or USB-C.

I’ve been using an external screen because it’s a more affordable and quicker solution than sending the Mac to a service center to replace the entire internal screen. Honestly, it’s even cheaper to buy another used Mac.

The issue was that I initially had to boot the Mac using an external TV via HDMI, since the 16" external screen was only acting as a secondary display extension and not mirror. I used a USB-C to HDMI adapter for this. After installing macOS, I managed to set the 16" external screen as the main display in the system settings, and dimmed the broken internal screen so I could use only the external monitor—no need for the TV anymore.

However, I’ve deleted and reinstalled macOS several times via Internet Recovery. At one point, I formatted the hard drive in Recovery Mode, but then the system couldn’t connect to Wi-Fi (it didn’t recognize the password or couldn’t access the network). Since then, whenever I try to start the Mac using either the external TV or the 16" external screen, nothing shows up.

I’ve tried the recommended steps, like resetting NVRAM/PRAM and SMC, but nothing has worked so far.

Any help or advice would be greatly appreciated.

Thank you!

Sincerely

[Edited by Moderator]