My Acer Aspire E1-531 screen is dim please help

[Gladys_9]

My Acer Aspire E1-531 screen is dim, i tried fn +brightness key but still it won't be bright, please help

 

[Gladys_9]

MERGED QUESTION
Question from Gladys_9 : "Screen is dim"

My Acer Aspire E1-531 is dim and tried fn +brightness key but still it doesn't work, Kindly advice