Only two things on the panel usually break:
The panel is cracked, or the ribbon cable is broken. Finding a ribbon cable break can be tricky, but sometimes you can obviously see a break in the copper.
On the controller, it is most likely the either the entire controller, or a connector.
On my screen I was able to determine the exact chip that was fried because that part got hot.
A capacitive touch-screen is an analog part, and a similar sized screen should work on another controller once calibrated.
Instead of repairing mine, I just removed the touchscreen which caused too much glare on the screen.