Acer Aspire E1-432

[aceer1]

i have Acer Aspire E1-432.its brightness of screen is not incresing onr decreasing.

 

[hang-the-9]

How are you trying to change it? Just with the hotkeys? Try going to the power options and set it to full power.
Also check for drivers on Acer's support site for your model, get the chipset and power drivers.