I am not here to cause any grief. I enjoy the site and the help here. I've gotten some great deals and wonder if they came from members here?
Recently I bought a well used Crown I-tech 4000. It doesn't work, yet the amp section is fine. The local tech placed his input control board into the amp and it works. Trouble is that board is not available. No Crown repair house that I've spoken with will fix this amp. The last one told me Crown calls these units "end of life" units.
Also, more recently, I see a boat load of these popping up for sale. They include the whole I-tech line-up (except new ones marked "HD" right in front). None of those are serviceable. Some prices don't reflect that fact. I've even seen full price being asked for old, well used amps, at the end of or nearing the end of their life.
So be warned, buyer beware.

Moderator, please read and delete or correct as needed. I'd hate to see someone here spend big bucks on a (future?) boat anchor!
I'd like to use the chassis for something, but Crown wasn't interested in helping me convert this old amp to a newer model or similar conversion. The main aftermarket Crown service center also said it wasn't possible.

I have (and had) many, many crown amps and liked them all (20+). I never ran into this before.