Blue vertical lines when printing

[SG36]

Blue vertical line printing on every page (when printing in color, black  & white is fine).  Have replaced the cyan cartridge, all other cartridges have plenty of ink left.  Have done multiple cleaning pages and lines still appearing.  Have also removed all of the cartridges, shook each one, and returned.  Still printing with lines.  HELP PLEASE!

[Sayed_S]

I would suggest you to perform Half Test Page.

Half Test Page : Print any page(in which you get Blue Line), when page comes out 10 %, then open cartridge door.
Starting part of the page would be fused(Heated and toner is pasted properly) and rest of the page will be unfused where if you rub from finger, the ink would come out.

If the issue only appears in fused part, then it confirms the Fuser Assembly has hardware issue. However, if the issue is on both fused and unfused part, it could be cartridge issue or Laser Scanner Assembly( also, it could be HVPS which is rare).

[Alex-TATS]

Hi @SG36,

It sounds more like an earthing issue to me. Try and clean all the contact springs where the cyan toner sits. Failing that I would recommend servicing the printer. The HVPS (High Voltage Power Supply - It is the board where the those springs make contact with) would most probably be faulty. So, replacing it would be my suggestion.

I hope that helps,

Cheers!