Forgot to reply. I had a look for any of those parts. Was hoping if I found some datasheets I could find out some more info. Would have to have a look before being able to do anything more.

From the looks of those parts you said you swapped they do look like frequencies in the part number. If they were the same pinout and it still didn't work then there may be another microcontroller dividing the frequency again in software but thats a guess.