Hi Yosha#,
Thank you for reaching out to Microsoft Community.
I'm sorry to hear about what happened to your Surface Book 3. Please try to boot your device first to its UEFI screen and check if the dGPU option is enabled. Refer to this page for the steps on
How to get to the UEFI settings. Once you are on the UEFI screen, go to
Devices then look for dGPU. If it is already enabled, disable it for a few seconds then back to enabled. Choose
Exit after then click Restart now.
If after the restart and still the NVIDIA Graphics card does not show, please run these steps below:
1: Run Surface Diagnostic Toolkit and check Windows Update
2: Update drivers and firmware
Check what is the current OS Build of your Windows version by going to
Settings > System > About.
Go to Download driver and firmware for Surface, choose Surface Laptop 2 then click
Download on the next page.
Choose the .msi file that matches your current OS Build and click
Next.
After downloading, run and install the .msi then Restart.
3: Run System File Checker Tool in Windows 10
If this answer your question, we highly encourage you to inform our Community by clicking on Yes or marking my post as an answer. This will help other members
who may have the same issue as you. Otherwise, don't hesitate to update us so we can further assist you.
Kind Regards,
Marrion Y.