One of these tabs may give an indication of the supply levels. Click the Supplies or Maintenance tab if available. Click the Start button and click “Devices and Printers”, then right-click the icon for the printer and choose “Printer Preferences”. On a Windows computer, you can often check supply levels through the Control Panel. A cartridge that is malfunctioning may have an exclamation point or some other error icon displayed. For many models, the toner levels are displayed graphically, so that larger bars indicate a cartridge that is more full, and shorter bars mean the cartridge is close to empty. If your printer has a control panel with a display, it will usually give an indication of the toner levels for each of the four cartridges in your printer. Fortunately, there are a few ways to find out which cartridge is empty or exhibiting an issue, so that you can narrow it down. When a toner cartridge is running low or causing printing problems, it is not always easy to determine which cartridge is causing the problem.

Hp 178nw color laser test