I replaced my whole 8.4" lcd for $49 on a 16m control last month. IF its the 8.4 they were made by sharp and used in laptops of that era. Took about 10 minutes to change and 9 screws I think. Was easier than a phone screen or tablet now a days. Pop it apart and look for part numbers. Other than Fanuc numbers you may get lucky. Ebay had a few of the ones I needed up to $100 I think. Most places were $2800+ for the whole thing.

Donny