Projector can not be opened, no reaction (Ji Jiji)

The multi-media classroom
the projector also has pressed the button to drop out
projector is not open, however, did not respond, the screen also does not fall down
this matter in the end is how I am also
ah Used properly, to die suddenly in the afternoon on

does not work, go to another screen can be easily reduced, that is, you have to control the curtain Power pulled down with a wire in the middle of the air and on both sides of a connection, one of which is up, one down.
Could not open the projector may be used regardless of the Control Panel, you can use the remote control , Try to check the power of good connections, and all of the socket connection is not loose.No electricity, check the power supply has detected a bad light ..
other parts of the general problem of the very few.

www.nbsmwx.com of control can not control, in control does not work, find a repair factory.