I would not reset Windows, clear the CMOS, or reinstall Windows yet, especially since you want to preserve your files. First, please clarify the following:
- What is the exact motherboard manufacturer and model in the CyberPowerPC? For example ASUS, MSI, Gigabyte, or ASRock.
When you turn the PC on, does the monitor eventually display the Windows sign-in screen, or does it remain completely black?
Is the monitor cable connected to the GeForce graphics card, rather than the motherboard video connector?
From another phone or computer, can you sign in to your Microsoft account at all?
- Do you have access to any phone number, recovery email, Microsoft Authenticator, or other verification method registered with the Microsoft account?
If that Gmail address was used to create/sign in to a Microsoft account, your Microsoft account password is not necessarily your Gmail password. You should try Microsoft's account recovery from another working device first.
Microsoft recommends using the Sign-in Helper when the normal password-reset methods are unavailable. If two-step verification was enabled and you no longer have access to any registered verification method, Microsoft Support cannot manually bypass the account security or provide a password-reset link.
https://support.microsoft.com/accounts-billing/manage/microsoft-account-sign-in-helper
Regarding the PC itself, the absence of the motherboard/CyberPowerPC logo happens before Windows loads, so that part of the problem is not caused by the Windows PIN.
If the PC reaches Windows but you never see the firmware screen, also try another HDMI/DisplayPort connection on the graphics card or a known-good monitor/TV. I would not clear the CMOS yet. On a BitLocker-encrypted Windows 11 installation, firmware or boot-configuration changes can cause BitLocker to request its 48-digit recovery key.
Also, Safe Mode will probably not solve the immediate problem because Safe Mode normally requires the account password rather than the Windows Hello PIN. The priority should be recovering the Microsoft account/password and determining why you cannot see the BIOS/UEFI screen.