HP Officejet 6500A Printer problem. Ser.No.

SOURCE: I have a message on my printer Ink System

Hi
Please do this and let me know
Unplug the printer, then pressing the help and ok buttons simultaneously plug it back in.
Let me know or Call +877 889 6859

SOURCE: I have a Ink System Failure.

I had this same problem but with a different error code. Try doing:
1. Unplug the power cord from printer.
2. Hold both o.k and Cancel simultaneously.
3. Plug the power cable while holding the buttons.

After I did this my printer reconfigured like it used to do and it was like it was new again.... well new plus a headache a managed to get while reading all these little posts. I hope this helps!

If not try going to this website:
http://www.out-of-warranty.com/how-to-reset-hewlett-packard-hp-all-in-one-printers

SOURCE: Ink System Failure (Error 0xc05d1381)

Don't waste your time on the copy and paste HP solution above.
If you really want to fix your printer:

Okay, HERE IS THE ACTUAL FIX FOR THIS ERROR.

1. Disconnect your USB cable.
2. Turn off the printer.
3. Press and hold down these four buttons at the same time:
OK, Cancel, Black, Color.
4. While still holding them down hit the power button once.
5. It will Blink.
5. Hit the power button again.
6. Continue holding until you get a message on the screen.
7. Allow the printer to sequence through and there you go.
Enjoy.