Need help please, my acer Aspire laptop 5920 turn on but with dim screen. I can hardly read anything on it. I connected it to

[Razola02]

Need help please, my acer Aspire laptop 5920 Window Vista turned on but with dark screen. I can hardly read anything on it. I connected it to a monitor and the laptop works fine. I bought a new screen , but still having the same problem. I've changed the RAM, the Inverter, I've done updates and don't know what else to do. Help please
OLA

 

[lp231]

have you adjust the screen brightness?

 

[1shado1]

Did the new screen or inverter also come with a new CCFL backlight?