HP920c cartridge light wont stop blinking, printer wont print

"All lights blinking and printer not responding" is indicative of serious ink cartridge issue. Usually when this happens the printer fails to goes through the motions of the printing process, kind of stands still with indicator lights just blinking away. This could be as a result of either of these scenarios.

cartridge has developed incompatibility or is incompatible

The Solution is to try an older/another cartridge (doesn't matter if ink is finished. You must replace cartridge one at a time). If lights stop blinking it confirms that your cartridge has become incompatible or developed incompatibility. Also if your printer is the type that can work with only one cartridge, remove one after the other (closing back the lid/cover) to determine which in the set (black or color) has become incompatible. At the instance the incompatible one is removed and you close the lid, the blinking will stop (for printers that can print with one ink cartridge only). Just replace the incompatible one and start printing again. In most cases the issue is always with one cartridge. But if both are affected, you have to replace both. Because of this type of problem, always keep used cartridges somewhere safe; they come in handy for this type of troubleshooting.

The electronic panel on the cartridge that makes contact with the cartridge carrier inside the printer is dirty and needs cleaning. This electronic panel is front part of the cartridge with copper "dots".

Cartridge electronic panel is dirty

The Solution is to try to clean this panel with a piece of folded tissue paper soaked in a bit of methylated spirit. Also try to clean the area in the cartridge carrier/holder that makes contact with the cartridge's electronic panel (Usually this is more difficult). If you cannot reach it with your fingers, use a stick or something with tissue wrapped around it. Allow to dry well and return the cartridges, close the cover. The blinking should stop if the electronic panel is the issue. Once the blinking stops the printer will print.

Good luck & God bless!

“All lights blinking” is indicative of serious ink cartridge issue. Usually when this happens the printer fails to goes through the motions of the printing process, kind of stands still. If it an All-in-One it still scans though. This could be as a result of eithe of these of scenarios.
i. Ink cartridge has developed incompatibility. Solution is to try an older/another cartridge (doesn’t matter if ink is finished. You must replace cartridge one at a time). If lights stop blinking it confirms that your cartridge has become incompatible or developed incompatibility. Also if your printer is the type that can work with only one cartridge, remove one after the other (closing back the lid/cover) to determine which in the set (black or color) has become incompatible. At the instance the incompatible one is removed and you close the lid, the blinking will stop (for printers that can print with one ink cartridge only). Just replace the incompatible one and start printing again. In most cases the issue is always with one cartridge. But if both are affected, you have to replace both. Because of this problem, always keep used cartridges somewhere safe; they come in handy for this type of troubleshooting.
The electronic panel on the cartridge that makes contact with the cartridge carrier inside the printer is dirty and needs cleaning. Solution is try to clean with a piece of folded tissue paper soaked in a bit of methylated spirit. Also clean the area in the cartridge carrier/holder that makes contact with the cartridge’s electronic panel. Allow to dry well and return the cartridges, close the cover. The blinking should stop if the electronic panel is the issue.

One or both print head are defective.Open cover put out color cartridge then close cover.If blinking stops replace color cartridge.If blinking continues put out black cartridge and put in color.If blinking stops replace black cartridge, if not stop replace both cartridges.

One or both print head are defective.Open cover put out color cartridge then close cover.If blinking stops replace color cartridge.If blinking continues put out black cartridge and put in color.If blinking stops replace black cartridge, if not stop replace both cartridges.

Theblack print cartridge is empty or missing. The black-print-cartridgelight is blinking, and then printer stops printing. An error 40208 iswritten to the event log. The printer cannot detect the print cartridgecorrectly. Action

1. Reinsert or replace the print cartridge.
2. If the print-cartridge light is still blinking but the Attention light is not on, turn the printer off, and then back on.
3. If the problem continues, contact HP Customer Care at http://www.hp.com/support/clj2550 or see the flyer that came in the printer box for other contact information.

Yes, sorry to say. The system uses all carts even to print in black.

I just experienced this with my 920c. I cleaned the contacts in the cartridge holders with alcohol and the problem went away.

first you tell new cartridge ink head safety strip remove or not ?
if not so remove safety strip

The Cleaning station is filled with ink AND the cartridge is broken, this can be caused by using a [poorly?] refilled cartridge.
To solve this you have to disassemble the printer and clean the cleaning station, replace the absorbent pad and replace the ink cartridge.