print head” on page 64. If the color blocks continue to show print quality problems after cleaning and aligning, contact HP customer support.

•History log: contains information that might be used for diagnostic purposes if you need to call HP customer support.

Cause: The print carriage was blocked by a paper jam.

If this did not solve the issue, try the next solution.

Solution 3: Ensure that the product is connected to a suitable power source

Solution: Verify that the product is properly connected to a suitable power source.

To verify the product is connected to a suitable power source

1.Make sure that you are using the power cord provided with the product.

2.If the product is connected to a computer, make sure the computer has a grounded (three-prong) power plug.

3.Make sure the power cord is firmly connected to both the product and the power adaptor.

4.Plug the power cord directly into a power outlet.

1Power connection

2Power cord and adaptor

3Power outlet

Troubleshooting

Errors 155