Re: OfficeJet 6500 printer, "Ink System Failure."

Hello

I understand you are getting a ink system failure.

Since you have already tried the troubleshooting and you are using Genuine HP Cartridges then I would try soaking the printhead, which is suggested from Bob's post.

http://h30434.www3.hp.com/t5/Ink-Toner-Cartridge-Printhead-Issues/HP-6500-Office-jet-E709a-Black-printer-cartridge-HP-920-not/m-p/447545/highlight/true

Hope that helps.