Hi
If a single inkjet in your printer is not functioning then output will appear as a horizontal line across the page. If one of the jets is on all of the time then output will have black or colored lines across the page. Use the following steps to isolate the problem:
- Replace the ink cartridge
- Check the flexible cabling for continuity and for short circuits between adjacent conductors
- Exchange the control board for a good one
- Finally check the power supply
Good Luck
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