Hello 수민채,
Welcome to Microsoft Community.
From your description of the problem, we have noticed that your Surface Pro 8 is currently in a state that does not boot properly.
The update pushed on September 24th fixed the abnormal battery limited mode reported by some users a while ago, but at present we have not received any similar situation as your feedback, but if the firmware update does have a problem, then we will report this situation to the Surface technical support team.
You've tried a number of options to repair your Surface, including using a Surface-specific recovery drive:
Creating and using a USB recovery drive for Surface - Microsoft Support ****
This process guides you through the creation of a Surface-specific recovery drive, which will then be used to restore your Surface to factory Settings.
But can you tell us what you're getting in the way of doing this and what error messages you're seeing? We need this information to determine what else can be done before sending your Surface to the Surface support team.
For the average user, restoring the Surface to factory Settings with the Surface Recovery Drive is the last step. This step is similar to reinstalling the system for other brands of computers. If this process does not help you reset the firmware and get your Surface back to normal, then I recommend sending your Surface to the Surface technical Support team for review and recovery.
I can direct you to get in touch with Surface Live Support, who can help you create service orders:
- Use your personal Microsoft account (not your organization account) to access the following links:
- Type The Surface fails to enter the system, press Enter, and click "Contact Support" at the bottom:
- Select Technical Support and select the device model you are currently using in Produce family, then click Confirm:
- You will see contact options for Chat support and Phone support, please contact them during business hours:
I wish you all the best.
Best Regards,
Mitchell | Microsoft Community Support Specialist