Erik van Straten@SpaceLifeForm : a spare motherbord won't help just like that.
The actual encryption key is stored in a TPM chip (the rescue code is used to allow the system to access to the actual encryption key).
So even if you have a spare mobo, you'll have to transplant the TPM chip from the old to the new mobo.
The best advice: have a backup, as recent as possible. My backups are on VeraCrypt encrypted external (USB) HDD's.