How to Fix HP Officejet 6500 Ink System Failure?

Oh, God !! My HP Officejet 6500 printer showed me the ink system failure message again and again. I can’t get to know what is the actual reason behind this problem. I have read some tech blogs to fix this but nothing helped me yet. Can you please help me with tested tips to fix this problem? Your quick response is needed.
Response by [Kelvin Morton]
Firstly, don’t panic about this kind of error message. You can easily fix this from our troubleshooting tips. Yes, you are right that there are so many causes behind this problem. Visit our blog to fix the HP printer ink system failure message. In our blog, you will find various reasons which cause this error. Thereafter you will find the top 10 solutions to fix the same.