photo tray error will not feed any paper

Check the pickup rollers for excessive wear, cracks or dust. You have to remember these printers are several years old which means problems like this are becoming more common. Check for dust and see if that's the issue before assuming the rollers are worn out.

Now if you find that the rollers are worn, there isn't much you can do outside of upcycle it as a scanner or replace the whole printer. The design of the print mech makes repair of this problem impractical. On these printers, you need to change the print mech as a single unit.

While there are no guides on the site to remove the jam door, it's not hard to do. Find the end with the tab that can fit a finger and pull in to remove the door.