Then you will need to call for service, or dig up a service manual and figure out what part is at fault, could be something blocking the path.
I don't think the problem is with the tray, I suspect the problem is in the printer, behind door A. See attached photo. I have swapped out trays, and if the problem was with the rollers, the problem would follow from tray 2 to tray 3.
Take out tray 2 and clean the rollers that feed the paper
I have an 8570 that will not print from the first (primary/internal) tray, or 'tray 2' as it's designated. I keep getting a jam in door A and have to pull the sheet out. Oddly enough, the thing runs fine from the 3rd tray below and from the manual feed.
Troubleshooting tips would be appreciated.