Chosen Solution
After a paper jam, printer wrinkles the end of the sheet. Therefore, printer useless. Is it the fuser? If so, how to replace it?
Canon MF4350d laser printer uses a group of rollers and a fuser all of which likely need cleaning, over time the little bits of paper flake off and collect on the rollers making the rollers slippery which then can impact the paper feed. I would start off getting the the service manual so you can identify all of the rollers and how to get to them. Using a good grade of Isopropyl alcohol on a cloth or cotton swab should clean things up.
