I often wondered if I could route my laptop GPS display to the backup camera via the AUX 2 input. I sent an email to ASA Electronics and received a reply that it would work if the output was in NTSC format. Jensen makes an adapter for this purpose. But you will also need an adapter cable from the laptop to the Jensen adapter. For me it was S Video to RCA and a 2:1 audio adapter. I order the S Video cable off the Internet and used a 2:1 audio cable I had laying around in my spare parts box. Once you have the cables hooked up and config'd the laptop for dual monitors your good to go.
Cables
Display
Linear Mode
