Hoping we have some HP printer jockeys here. Here's our favorite HP J6480 AIO that suddenly comes up with "Paper Jam - clear paper path and press OK". Well, there wasn't a jam (that I know of) and we've pulled the thing apart as much as we can. Main Clamshell, ADF, duplexer, feed trays, exit port, dismout and remount the tanks. Took a can of compressed air to it to eject any little bits that might remain. The alert appears even if disconnected from the PC. Did a soft reset and a hard factory default reset. Didn't help.
Is this thing headed for the recycle bin?