try this : (from : http://www.fixyourownprint
This is how to reset your HP PSC 1210:
* Set your computer system date to a date before the expiry of the ink cartridges.
* Start the following program: C:\Programs\Hewlett-Packar
* Use the password "Homer"
* Choose the reset directory
* Hit the total reset button
* Follow the instructions
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by: jhyieslaPosted on 2009-03-04 at 04:34:08ID: 23794049
My only suggestion would be to turn off the printer and unplug all cables from it for at least 2 minutes. Assuming that you have this connected via USB, also have your PC powered off. Then reapply power and see if this changes the lights. If the lights are still messed up, it's toast. If the lights come back, reconnect the USB cable and boot the PC and try and do your normal functions. If they still don't work, I'd remove all of the printer software and reinstall. If still nothing... toss it out and get a new one.