Replacing the display on a MacBook Pro (16-inch) 2019 model can be quite a delicate process, best handled by professionals or those experienced with electronics repair. Here’s a general outline of the steps involved:

1. **Prepare the workspace**: Make sure you have a clean, well-lit area to work in. Use an anti-static mat and wrist strap to prevent damage from electrostatic discharge.

2. **Gather necessary tools**: You’ll typically need screwdrivers (Phillips and possibly Torx), pry tools, and perhaps suction cups to remove the display.

3. **Power down and disconnect**: Shut down your MacBook Pro completely and disconnect all cables and peripherals.

4. **Remove the bottom case screws**: Turn the MacBook Pro over and remove the screws securing the bottom case. Keep these screws organized, as they may vary in size and length.

5. **Detach the battery connector**: To prevent any electrical mishaps, disconnect the battery connector from the logic board.

6. **Remove the display assembly**: Carefully lift the display assembly from the bottom case. You may need to use suction cups to lift the display without damaging it.

7. **Detach the display cables**: Disconnect the display data cable, LVDS cable, and any other cables connecting the display to the logic board.

8. **Replace the display**: Install the new display assembly by reconnecting the display cables and carefully placing the assembly back into position.

9. **Reassemble and test**: Reattach the bottom case screws, reconnect the battery, and power on your MacBook Pro to ensure the new display is functioning properly.

10. **Final checks**: Check for any loose connections or screws, and ensure that the display is sitting flush with the bottom case.

Remember, this is a general overview, and the specifics may vary depending on the exact model of your MacBook Pro and the replacement display you’re using. It’s always a good idea to consult a repair guide specific to your model and, if you’re not comfortable with the process, seek assistance from a professional technician. Additionally, if your MacBook Pro is still under warranty or AppleCare, it may be best to contact Apple for repair options.