Help in laser keyboard

i have a laser keyboard and the projector inside it is really weak I can’t see anything unless i put it’s really close to the surface that’s it’s at which makes it impossible to use , the projector used to work fine and it still works but it isn’t strong enough for the eye to see.
Any help or suggestions are really appreciated since it’s my sons keyboard and he wants it to be fixed.

Hi Soldiab,

You check is Li-On Battery voltage is OK?Maybe battery loose good voltage and device not good working.

Best Regards!