If you are having a printing problem with an HP LaserJet 6L on Windows 8, it could be the drivers. When a client contacts me regarding this printer on Windows 8, the first thing I ask them is ‘Where did you get the drivers?’ and is told that Windows 8 installed it for them once it was connected.
Unfortunately, when Windows 8 automatically install drivers for the HP LaserJet 6L, it may install incompatible drivers so you will want to manually add the drivers from HP’s website before connecting the HP LaserJet 6L printer. As a rule, you should always connect printer last or connect it when the printer’s installation software prompts you to do so.
One option is to have it powered off while the data cable is connected. The second option is to have it on (so you can set any language, time, etc) but the data cable is not connected to the computer.