Thats what I would had checked & suggested "IF" you had provided me with " show configuration chassis fpc 0" output which you didn't. fpc0 becuase your orginal output indicated mpc3e in fpc0. Later i see you moved to different slot.
But anyways, good that the issue is the resolved.
BTW, (apart from fpc issue), this chassis have mis-matched PEM. Ensure that you have same type of PEM.