To avoid costly repairs, follow this schedule from the :
: Detailed instructions on installation, basic operation, and using the projector menus. Quick Reference Guide epson h842b projector manual
If your H842B model includes network capability: To avoid costly repairs, follow this schedule from
: If the image looks like a trapezoid, use the horizontal keystone slider or the vertical keystone buttons on the control panel to square the edges. : If your specific To avoid costly repairs
To prevent overheating and extend the life of the lamp, clean the air filter regularly. According to Epson's maintenance instructions : Turn off and unplug the projector. Open the filter cover (usually on the side or front).