I had this problem with my CPL-680DW on Linux Mint 18.2. Suddenly no colour printing. From my phone no problem.
I tried the solution of ewige, only slightly different menu layout on the printer:
1) (Menu) > Image Management
2) Run an Auto Color Registration
3) Run an Auto Tone Adjustment
Without step 4) are the colours back.
I tried the solution of ewige, only slightly different menu layout on the printer:
1) (Menu) > Image Management
2) Run an Auto Color Registration
3) Run an Auto Tone Adjustment
Without step 4) are the colours back.