After working inside your
CAUTION: Leaving stray or loose screws inside your computer may severely
damage your computer.
Replace all screws and ensure that no stray screws remain inside your computer.
Connect any external devices, peripherals, or cables you removed before working
on your computer.
Replace any media cards, discs, or any other parts that you removed before
working on your computer.
Connect your computer and all attached devices to their electrical outlets.
Turn on your computer.