Well, I totally don't understand why, but when I turned off my external USB hard drive (a big one filled with a lot of photos), the printer started working again! Its a miracle! Thanks for the advice, I appreciate it. Go figure.
Coincidentally, I am having the same problem, moved the printer a few feet, moved it back, re-connected all the wires, and now it won't print. I can make it print test sheets, but when I try to print a photograph, it just sits there. I can see the job in the printer queue, but can't start it up...
My Pro 3800 was recently re-connected to my main computer. It wouldn't print. I re-loaded newer drivers, re-booted everything and while it will print a test sheet fine, when I try to print a photo, it gets to the printing screen, pointer moves about one quarter of the way across and then it just...