Solved! display black when the power is on

[tnguy20]

last week i accidentally elbow my laptop keyboard then my laptop screen turn black i connect it to a monitor and it show please help i have a important test i need to do

 

[rgd1101]

what the exact laptop model? you might have switch use external monitor only. read the manual on how to switch it back

 

[tnguy20]

what the exact laptop model? you might have switch use external monitor only. read the manual on how to switch it back

it's a asus laptop model E410M

 

[rgd1101]

https://www.asus.com/us/support/FAQ/1038312
fn + f8