How can i unlock my hitachi cp-s240 withouth remote control?

SOURCE: Hitachi cp-s240 blue tint cloud problem

This might sound like a worn spot in the (blue) lens from heat, or a bad color driver on the mother board. It could possibly be dirt or condensation behine the lens(s)

SOURCE: Hitachi cp-s240 remote question

Hitachi data projectors are able to function as a mouse using either the USB port or the control port located on the back of the projector.

However, they are not intended to be used as a remote presenter. This means that although you can use the remote as a mouse, you will not be able to change slides in a full screen slide show using powerpoint.

I recommend the Targus remote presenter for this purpose. This device will function as a mouse, pointing device, and will allow you to change slides in powerpoint. In addition, it's inexpensive, wireless, and small enough to easily fit in your pocket.