That's very cool but how can you be sure it's the exact same one used in the show? Did you get it from a Prop House?
As for the wear and tear, that's called "Patina" and it makes it more desireable, at least that's what they say on eBay.
The buttons are yellowed from the fire retardant in the plastic, common problem with old electronics, especially Computer parts.
There is a process for making them look new again but you'll have to Google it, something to do with Hydrogen Peroxide I think.
I love the X-Files and have been rewatching the series from the beginning these last few months.
It so bizarre to remember back when their giant Cel Phones seems so high tech at the time, and their Computers running DOS or Windows 3.1.
Damn, has it been 20 years since that show first aired!
I'm sure a Professional Monitor would have Pincushion adjustments, even my old XBR had them but they were in the Service menu, that was accessed by holding in a hidden button on the back while you powered the set up.
You may be dealing with some aged Capacitors at this point in time, Phil Nelson just had to recap his Sony of a similar vintage.
An ESR Meter really comes in handy on this modern stuff, I need to get one myself.