I had a problem with my L805 sending paper straight through without printing anything. A chat with the everhelpful Alex at Print Experts resolved it. Just run a load of blank plain paper through to clean the rollers.
Although that works, I found it tedious to keep pumping them through. So, I opened Notepad and typed an asterisk with the font set to 4 and printed fifteen sheets. This leaves an almost invisible mark on the paper so it can be reused and keeps the printer clean fron the residue left by sublimation papers.
I do this every Monday morning and have had no problems since.
I hope someone finds this helpful.
Ray