How do I get a manual for my Coby DP-812 Digital Photo Frame?

SOURCE: need a manual for the Coby DP-768 digital photo

http://www.cobyusa.com/files/manuals/DP768_MN.pdf

SOURCE: I have a digital photo

Your 4GB card is actually an SDHC card, not an SD card. While SDHC cards will fit into SD slots, they are electronically incompatible and will not work. You need to use an SD (or MMC or xD or MS), 2GB and smaller.

SOURCE: need instructional manual for Coby DP850 digital

You may download the manual here.