From what I was told...
Only the early batches of DR1X repeaters could be turned into DMR repeaters. Yaesu got wind of that and did something to thwart that a few years ago. Since then, all of their new repeaters, as well as the refurbished models they sell will no longer do that conversion. Additionally, in their effort to stop that conversion from happening, Yaesu pulled back in old DR1X repeaters through a trade-in "upgrade" program to DR2X. I could be entirely wrong, but I do not think so. I never converted one as I like them as they are. A guy heard I had a earlier model and offered to purchase it. He then advised me of what Yaesu did. ( I declined his offer )
Well, I presume you tried the steps I noted above to no avail. It appears you may have spare parts you paid $200 for, or you can spend some more and send it to Yaesu for repair. Either way, getting that to become a DMR repeater does not look like it will happen. I have read posts people made explaining that they sent their repeater into Yaesu under warranty, only to get a different "working" one in return. Probably one that Yaesu "fiXed".
As for the advice prcguy provided, that is the point of a forum like this and it is good advice. You steered it that way by posting what you wanted to do with the repeater. Unfortunately, he is getting old and his psychic mind reading is not as good as it used to be, so he was not aware of your budget. It is a hobby for me as well. I also know it is a hobby for prcguy too and many others that use this forum.
If you are able to fix it, please come back and post what you did. Remember, search engines parse these threads and someone else may encounter the same problem as you. I'm sure they would enjoy reading your solution.