How to Troubleshoot the Fax Machine on an All

Plug the power cords in, push the power buttons on and get everything up and running. Sounds simple, but lack of power is the culprit quite often.
Check for a phone connection in the correct input jack. Some printers with fax capability have more than one phone jack so you can hook up an answering machine or another phone 'downstream' from the printer. Consult your instruction manual to determine the right connection for your printer.
Swap out the all-in-one printer for a working phone to find out if the problem is in the phone line coming from the wall. Once you hook up the phone, you should get a dial tone if the line is working. Remember to reconnect the all-in-one printer after you're done.
Open up the machine and examine the feed path for the documents that you fax. Clear any obstructions you may find. Repeat this process with the paper tray and the path that copy paper takes through the all-in-one printer.
Verify the fax number of your intended recipient. Also get your correct fax number out to the people who need it.
Review your operating instructions and eliminate the chance for human error. Inadvertently skipping a step or misinterpreting an operation could be creating a problem that is simple to fix.
Run through any system-specific troubleshooting regimen that is recommended by the all-in-one printer's manufacturer.