Sorry but I think this is way beyond your possiblities, as of today.
You need to be reasonably equipped , be able to read a schematic, (which you donīt have), identify parts, measure whateverīs needed, get and replace parts,, etc.
All doable but it takes time ... say a couple years.
Imagine learning German or Chinese just to be able to read a single book.
For now, maybe you can go along with the still alive channel ... and be careful so it does not die as its brother.