These are some common tools used to work on this device. You might not need every tool for every procedure.
The Dell Photo Printer 540 is a printer that specializes in printing color photos in a 4"x6" format. This device can be identified by the "Dell Photo Printer 540" label on the bottom of the printer. This printer was officially released in 2004 and has the capability of connecting to a computer and Flash Memory cards. The device serves as a portable and easy-to-use photo printer. The photo printer has an LCD screen and a pull-out printing tray.
You can find a troubleshooting guide here: Dell Photo Printer 540 Troubleshooting