Normally there is a kodak software you run on the PC and it show you the pics from the camera. Your trying to print directly to the printer without a PC? If so then you would use the printer menu.UPDATE: Found the 310 user manual online from the Kodak site.http://resources.kodak.com/support/shtml/en/manuals/urg00431/urg00431c3s3.shtml
Check your battery. If that does not do the trick then you have an issue with the camera electronics and given the high cost of proprietary parts and labor you are better off replacing unit.