![](/images/backgrounds/286938/hp-deskjet-720c-users-manual-54880530x1.png)
C H A P T E R
4 Getting Help
When Things
Go Wrong
If the print cartridge light continues to blink after you install new cartridges, check the part numbers on the cartridges.
Black: 51645A
Color: C1823A
hen problems occur, the quickest way Wto find a solution is to use the online troubleshooting feature. With a few clicks of the mouse button, you’ll find your specific problem and details on how to fix it.
CLICK YOUR WAY TO A SOLUTION1
shortcut (or icon) on your desktop first. (See page 11 if you can’t find the HP Toolbox.)