Call Canon parts: 866-481-2569Request part CM1-7226-000 "FPC ASS'Y TOP" (Flexible Printed Circuit Assembly, top of camera)Cost is $18 with shipping. Direction you should go back to page 40, post 400. Watch out of the main connector. Goodluck.
I did order the part CM1-7226-000. Tried to replace per direction, but it is death. I don't know if I slice in the connector incorrectly or not. Anyone has an idea. I should bring it to Canon for them to see.