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1Printer Information: Shows printer information (such as the printer model number, serial number, and firmware version number), the number of pages printed from the trays and duplexer, the ink level information, and the printhead health status.

NOTE: Ink level warnings and indicators provide estimates for planning purposes only. When you receive a low-ink warning message, consider having a replacement cartridge available to avoid possible printing delays. You do not need to replace cartridges until prompted to do so.

2Test Pattern 1: If the lines are not straight and connected, align the printheads. For more information, see To align the printheads.

3Test Pattern 2: If there are thin white lines across any of the colored blocks, clean the printheads. For more information, see To clean the printheads.

NOTE: If there are thin white lines across all the color blocks and thin white lines across the gray blocks in Test Pattern 3, do NOT clean the printhead. Calibrate the linefeed instead. For more information, see To calibrate the linefeed.

4Test Pattern 3: If there are dark lines or white gaps where the arrows are pointing, calibrate the linefeed. For more information, see To calibrate the linefeed.

To align the printheads

Whenever you replace a printhead, the printer automatically aligns the printheads to ensure the best print quality. However, if the lines in Test Pattern 1 on the Print Quality

Solve print quality problems

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HP Pro 8500A - A910a, Pro 8500A Plus - A910g, Pro 8500A Premium - A910n manual To align the printheads