2 year old hp2000cxi printer shows Empty Black Ink message.This unit has separate ink cartridges and printheads for each color. Replaced black ink cartridge 2 times. It prints one page then Empty Black Ink message again.It didn't give a low ink message first like it usually does when actually empty. Replaced Black Printhead, still Empty Black Ink message.Cannot establish 2 way communication message shows it's face a couple times.It did spit out Ink Cartridge Information page showing no black ink But is printing the text in good looking Black text so some ink has to be getting through. Expiration dates on new printhead and new black ink cartridge are good. Have reinstalled software and tried updated driver. Also tried installing on another computer with same results.