I've taken this from a brilliant site www.fixyourownprinter.com try it and see
If it doesn't work then I'd try browsing their forum threads to see what else you can find.
- Fix your HP Photosmart D7360 (Reset Code/Master Reset) ***
1- Turn off power and unplug from power source.
2- Open right side of printer (looking at the front).
3- Disconnect,by pulling gently, both white flat ribbon cables off the main circuit board.
4- Plug in power source and turn printer on. Wait till you get a error message and push "Ok".
5- Unplug power source.
6- Reconnect the flat ribbon cables by aligning and carefully pushing into the conectors on the main circuit board.
7- Plug in power source and turn printer on (Printer prepairing occurred.
8- voila, the nasty error message 0xc18a0001 "Ink System has Failed" is now gone.