Hi Bin Ji__,__
Thanks so much for sharing all the details it really helps paint a clear picture of what’s going on with your Surface Laptop. I can imagine how frustrating it must be to deal with a screen that keeps freezing and eventually goes completely black, especially after trying so many fixes. You’ve done a great job troubleshooting so far!
What We’re Seeing
From everything you've described the disappearing mouse, the screen freezing, the temporary fixes like Alt+Tab and closing the lid, and now the internal display staying black even after a factory reset it’s looking more and more like a hardware issue with the internal display.
Even Ubuntu couldn’t get the internal screen working, and the fact that the external monitor works perfectly tells us the graphics system is okay — it’s just the built-in screen that’s having trouble.
What You Can Try Next
Here are a few friendly suggestions to help move things forward:
Run the Surface Diagnostic Toolkit This free tool from Microsoft checks for hardware issues and gives you a report you can use if you need to contact support. You can grab it here: Surface Diagnostic Toolkit
Try UEFI Without the External Monitor Restart your Surface and hold Volume Up + Power to enter UEFI. If the internal screen stays black even here, that’s a strong sign the display hardware itself might be the issue.
Reach Out to Microsoft Support Since you’ve already done a factory reset and updated everything, it’s time to let the experts take a look. You can start a service request here: Surface Support
If your device is still under warranty or covered by Microsoft Complete, they might offer a repair or replacement.
If you’d like help checking your warranty status or drafting a message to support, I’d be happy to assist. Just let me know what you need I’ve got your back!