Epson PowerLite 4100 Operator's Manual page 5

Operator's Guide v
DO NOT operate the printer unless its voltage is set to the local line
voltage, as described in this manual.
Keep printer vents free from obstructions.
Keep the printer dry. If water is accidentally spilled on the printer, turn
the power OFF immediately and wipe it dry. Do not turn the power on
until the printer is completely dry.
Do not lean or stack objects on or against the printer. If an object is
accidentally dropped into the printer, turn OFF power and carefully
remove the object.
Use a high-quality, well-shielded interface cable. Both connectors
should be metal and connected to chassis (frame) ground.
Make sure the power is OFF anytime you are connecting or
disconnecting the power cable or interface cable.
Be sure the cover is secure while the printer is running.