Here are some T/S steps for your problem:
Color button and open the scanner unit. Follow the messages on the LCD panel to replace the empty cartridge. See :
Running a printer operation check
If you are unable to determine the source of the problem, performing a printer operation check can help you determine whether the problem comes from the CX6600 or the computer.
To perform a printer operation check, follow these steps.
Disconnect the USB cable from your computer.
Make sure that Letter-size paper is loaded in the sheet feeder.
On button to turn on the CX6600, and make sure the ! Error light is off.
Press the Setup Mode
button to enter Setup Mode.
Press the A
Select button repeatedly until 3.Nozzle check appears on the LCD panel, then press the
Color button. The CX6600 starts printing.
The CX6600 prints an operation check page that includes a nozzle check pattern.
Compare the quality of the printed test page with the sample shown below. If there are no print quality problems, the CX6600 is fine and the problem probably lies with the printer software settings, the application settings, the interface cable (be sure to use a shielded cable), or the computer itself.
If the test page does not print satisfactorily, there is a problem with the CX6600. For example, if bands appear in the check
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