The carriage might become stuck on either side or in the middle of the product. The Carriage Jam: Open Door, clear carriage jam, and then press OK to continue error message displays on the control panel display.
The following video demonstrates the steps for fixing a carriage or paper jam. The product shown in the video is the HP Photosmart C7280. The outside of the product might look different, but the steps are similar for your product.
If you have trouble viewing the video or to view the video in a different size, click here to play the video (in English) on YouTube.