how to stop dell inspiron 5520 8 beeps

[TheDevastator_1]

Hi, I disconnected the display cable from my laptop screen cuz I want to use an external monitor but When I turn the laptop on it start beeping 8 times I know it means lcd failure but I want to stop the beeping and turn on the laptop

 

[rgd1101]

you don't need to disconnected the display cable to use an external monitor.