The Quick Answer
To fix a paper jam on the HP Envy Photo 7855, squeeze the tabs on the rear access door to remove the duplexer and pull out any stuck paper. If the error persists but no paper is visible, you have a "false jam"—unplug the printer for 60 seconds to reset it, and clean the rubber feed rollers with a damp cloth.
Locating the Hidden Jam
The HP Envy Photo 7855 has a complex paper path to support automatic double-sided printing and a separate photo tray. Check these three critical areas:
1. The Rear Duplexer (Most Common)
Go to the back of the printer. Push the two tabs on the rear access door toward each other and pull the door off. Gently pull any jammed paper completely out. Check the rollers on the door itself for tiny torn scraps.
2. The Main Carriage Area
Open the top cartridge access door. Shine a flashlight inside and look to the far right and far left. If the carriage is stuck, do not force it. Remove any paper blocking its path. If the carriage is free to move, gently push it to the right to check for paper hiding underneath it.
3. The Photo Tray
Pull out the main paper tray. Check the smaller photo tray sitting on top. Paper can sometimes misfeed between the two trays. Remove all paper, ensure the guides are snug, and reinsert the tray.
Fixing a "False" Paper Jam
If you've checked everywhere and the printer still insists there is a jam, the optical sensors are either dirty or experiencing a glitch.
- Hard Reset: With the printer turned on, unplug the power cord from the wall. Wait 60 seconds. Plug it back in. This clears software-induced false jams.
- Clean the Rollers: Dust on the gray rubber feed rollers causes them to slip. When they slip, the printer assumes a jam has occurred. Wipe them down with a lint-free cloth lightly dampened with distilled water.
