When your computer does not boot up or start, you need to perform a hard reset to fix it. And if you dont know how to do it, follow the steps below:
Ø First, turn off your computer and disconnect all adapters or power cords and external peripherals.
Ø Now, you should press and hold the power button for at least 15-20 seconds.
Ø Now assemble all the unplugged cords and peripherals.
If you require assistance, call Dell customer Care Phone number to avail expert help from experienced employees.
For More information click on this Links:-
Dell customer care phone number
Dell customer support