Using this Sony projector is easy. First, connect it to the correct power supply that comes with it. Then, connect your media source like a laptop or DVD player. Adjust the focus and keystone correction for a clear and proper - sized image. When using, keep it in a well - ventilated area to avoid overheating. As for maintenance, check the filter regularly and clean it when it gets dirty. Also, since an option slot cover is missing and a screw in the plastic lens door is gone, be careful when handling it to prevent any further damage.