I took my shifter apart and could not find anything wrong all the wires we in the right place, and all the pots where attached. can anyone offer any other seggestions

Hi ive had my G25 for a while now and i have been happy with it until now. the problem is i had put it away on a shelf for a bit coz i was busy with lots of school work, when i next came to set it up the shifter now only registers fith and sixth. if i put it in first the computer tells me im in fith if i shift into 2nd the computer tells me im in sixth, and the same for 3rd and 4th. reverse works fine and if i put it in sequencial mode then it says i go into 1st and 2nd like its supposed to. i was looking around and some people semed to think that mabye a wire is loose so i toke it apart but could not find a wire loose.

i was wondering if anyone has any suggestions