Our Dell 2665 printer is printing colored vertical streaks. If a multi-page document is printed, they are worst on the first page and light to nonexistant on later pages. They appear on every print job:
We have tried the suggestions from the Dell troubleshooting page of replacing low toner cartridges, replacing the transfer belts, and replacing the drum cartridges. We also tried the raster optical scanner window cleaning suggested on another Dell support page. No effect from any of this.
How can we fix the printer to stop these streaks on every print job?