I've been printing using my HP DeskJet 822C for months now. All of a sudden, when I try to print, the toner cartridge light starts blinking in red. A few minutes later, a message pops up on my screen advising that my printer is unable to communicate with my computer. The only think I've added since is a scanner, which I have since removed and uninstalled in order to troubleshoot. I have purchased new toner cartridges; uninstalled and re-installed the printer software, run scandisk and defrag; run virus software; checked printer cables, as well as purchased cables approved by HP. Nothing !! My next step would be to either throw it in the garbage or send it HP for repair. Any help you can give me would be a blessing !