Bitlocker encryption key details
Bitlocker encryption key details
You might want to consider giving up and replacing the motherboard if you can't recover your BitLocker key or understand how to use it.
You can still reinstall Windows even without a screen. If you can’t see anything when booting, try using the recovery options or a USB drive to access the installation media.
Yes, you can start from a USB drive. It allows you to reinstall Windows.