What does it mean when it says scanner failure?

Hello it means that the scanner bulb temperature is too low or there is some internal or external electrical malfunction.Try these solutions.
1.Check the scanner light.Make a color copy of any document by pressing the Start, Copy, Color button on the product control panel.While the product is making the copy, lift the scanner lid slightly to see if the scanner light is visible.
2.Make sure that the room temperature is suitable for your device
3.Perform a Power Cycle on the unit by following the steps below:
1.Turn the unit off.
2.Unplug the power cord from the unit.
3.Wait 30 seconds, and then re-connect the power cord to the unit.
4.Turn the unit on.
5.Make a color copy by pressing the Start Copy Color button on the control panel.
4.Check the power connections.Disconnect the power cord from any power strips or surge suppressors and then plug it directly into a wall outlet.Try making a color copy by pressing the Start Copy Color button on the product control panel.If the error message displays again, temporarily move the product to a different room, or plug the power cord into a different wall outlet.
5.Perform a partial reset
1.Disconnect the power cord from the product.
2.Press and hold # and 3 while reconnecting the power cord to the product, and then release both buttons.
3.Try making a color copy by pressing the Start Copy Color button on the product control panel.
6.Perform a semi-full reset(Performing a semi-full reset deletes any saved phone numbers on the product).
1.Disconnect the power cord from the product.
2.Press and hold # and 6 while reconnecting the power cord to the product, and then release both buttons.
3.Try making a color copy by pressing the Start Copy Color button on the product control panel.
If nothing of these works and you still see the error you should take your printer to support service for repairing the parts.