Hi fghgfhhghfghgdhhhhhh,
Thank you for reaching Microsoft Community and I'm sorry to hear that the display adapter of your Surface laptop 3 was accidentally disabled.
Please try first to disconnect all peripherals connected to the Surface including dock, external monitor, USB drives and power supply then press and hold the power button for 20 seconds. Wait for around 10 seconds then turn the device back on and connect the external monitor. See if it displays now on the external monitor. If not, press Windows key + CTRL + Shift + B.
If still issue persists, try booting the device to its Windows Recovery Environment through these steps:
- Hold down the power button for 20 seconds to turn off your device.
- Tap the power button again to turn on your device.
- A second after tapping the power button, press and hold the power button again for 20 seconds to force it to shutdown.
- Press the power button again to turn on your device.
- A second after tapping the power button, press and hold the power button again for 20 seconds to force it to shutdown.
- Press the power button again to turn on your device.
- See if the device restarts you to the Automatic Repair screen, select Advanced options if it does.
From the Choose an option screen, try doing a System Restore first.
Let me know how it goes.
Kind regards,
Marrion