Photoshop preferences have been deleted but I am still unable to print. Are there preferences somewhere else that I should be clearing out?
Success! I have no idea what the issue here is but I tried printing a completely different file as a test, and lo, that file prints fine. The other file does not. Since the file I'm trying to print is a rasterized Illustrator file, I just rasterized it again so I'm working with a new file, and it prints! I am so pleased.
I had the same problem with CS5. I have an Epson WF-3640 all in one and an Epson Surecolor P400. The problems started when I downloaded the custom ICC profiles for the P400. It worked at first with glitches and then PhotoShop wouldn't recognize either printer.
Following the advice on these boards, I uninstalled and reinstalled my printer software. Didn't work. There seemed to be either a deep conflict or something in the printer software had corrupted Photoshop. I deleted Photoshop using the uninstall and decertified the computer. Then using clean my Mac, I found additional hidden files that hadn't been deleted and wiped those too. I then restored PhotoShop from a Time Machine back-up before I got the P-400, when life was good.
Everything works now and the custom ICC profiles are available again. (I have now saved the current set up from Time Machine). I have been very careful to:
set the Color Settings to North America Prepress 2 as instructed in the P-400 manual.
View - Proof SetUp - Custom - allows me to proof the photo according to the appropriate ICC profile.
The in the print dialog box: PhotoShop manages color and I access the same ICC profile I used to proof. (Incidentally, I have found it helps to boost the brightness when printing to allow for the differences between transmitted and reflected light.)
I hope this helps and that it saves you wanted time and effort.