Try cleaning the printhead and the area inside the print where the print head connects. Use folded tissue soaked in a bit f methylated spirit. If this still doesn't work, then it most certain that the cartridges have become incompatible and have to be replaced. Cartridges becoming incompatible is usual, sometimes resulting from expiration. If replaced with original cartridges the issue should be resolved
Good luck & God bless!
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I have the same problem. Cartridges are new. Only printed for 2 weeks with them. Turn machine off for 2 weeks and moved it to another room. Start up is an alarm errro wrong cartridge. Is there a system reset other than off/on? How does one enter into service mode?
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