A: laptop external display device , there are usually four display output control.

 

* Laptop LCD screen with bright , bright external display device

 

* Laptop LCD screen lit external display device does not shine

 

* Laptop LCD screen is not bright , bright external display device

 

* Laptop LCD screen is not bright , not bright external display device

 

Solution: Simply press the laptop keyboard function keys to switch to .

 

Q: projector output image is unstable , striped fluctuations ?

 

 

A: The projector power supply signal and the signal source signal is not common ground.

 

Solution: The projector and the signal source device power cord plugged into the same power strip.

 

Q: northern cold regions, projectors use often occurs boot failure

A: When the projector is working , the ambient temperature is often ignored and cause damage to the machine .

 

Solution: After get the room from outside , do not immediately turn , should be placed in the room for some time and then boot .

 

Q: When buying , projection good results, the use of discovery back poorly ?

A: Many times the problem is not the machine .

 

For example : the input source signal to noise ratio is not ideal ; poor quality projection screen , a direct impact on the projection screen .

 

Solution: Note that the source selection . Consulting buyer , select the purchase of machinery to match the screen.

 

Q: projection screen is not 4:3 ratio , there trapezoid ?

A: Different different projection angle projector lens , with horizontal projection , there is elevation projection.

 

Solution: projector with keystone correction function can be adjusted to the panel or the function menu settings ; may also adjust the projector base or legs debug screen effect .

 

Q: projected image ghosting

A: When most of the cases due to poor performance Suozhi connecting cables .

 

Solution: Replace the signal line ( note the matching device interface )