I was repairing a water damaged Kindle Paperwhite and upon powering on after the clean i got a repair code 2.
I isolated the problem to be a short on the led light connector. It had burnt out but the lights still went so was hopeful it was ok. However the short must have been drawing too much current which triggered the repair code 2 error.
So if you encounter a repair code 2 error it’s likely to be a short somewhere.