They not only have techs and manuals but spares they can swap in to find the bad part or parts.

Lightning damage can wipe out every board so you have to really think hard here. If the damage got to the panel then it's just not cost effective to repair. We know that all boards are suspect but in this case it can easily be all boards.

I'd dump this on Ebay as-is or at the recycle farm and go shopping.