Tonner not installed - Konica Minolta Magicolor 4690MF Multifunction Laser Printer

Remove the developing unit and clean the contact in the rear side .

Is it a Canon cartridge, sometimes generic don't work properly.

1 Printer off then removing tonner and shake 5 times after insert tonner then switch on printer
2 tonner powder emty then refilling tonner

Install the old black tonner back inside, if the yellow vertical marks disappear then the problem is in the new black tonner

this could be a problem with the tonner or the configuration of ink... in both cases try with another catridge or tonner, if the problem solves then is because the cartridge or tonner no have enough ink to print
...... if the problems persists maybe could try verifing the configuration of your printer or re instaling the printer too...

after refilling the tonner of xerox workcentre 3119 printer showing tonner empty message

Hello sir; Make sure you do removed the seal or cap!

so your machine is new then.
there is a installation manual inserted at the quick guide and cd manual

Tonner light is blinking means that the tonner life is end.

The other problem come from usb cable change the cable.

Those printer tonners are very tricky to refill and a bad refill induse on bad printing so you can clean the drum (the round green thing) with isopropilic alchool. If it continues it indicates that the blade ( inside tonner plastic blade that cleans the excess tonner powder) is durty and you can clean it too with the same alchool. If it continues replace the tonner cartridge.