Trackpad doesn't work but clicks
I have a 2008 MacBook where the trackpad doesn’t work and the cursor is stuck in the upper left corner but the clicking works.
I replaced the uppercase as I got it cheap and the trackpad worked at the beginning but then not sure what happened but it stopped working when putting everything back.
I then put back the old trackpad which I know worked before but was glitchy but now the same thing issue occurs, cursor frozen but clicking works. Cursor does move if I plug a USB mouse in and I also already tried the PRAM reset and no, I don’t have a bulging battery.
Aside from the trackpad connector that plugs into the logic board, is there something else on the logic board that controls the trackpad part?