Your laptop will not boot unless it can communicate with the display. Certain display failures can still allow for boot, such as if the display backlight failed. In that case, you wouldn't be able to see anything on screen, but as the motherboard could still communicate with the display the system could boot. In your case, the motherboard can't communicate with the display, so you will never be able to boot. You could replace the display to see if that is sufficient to fix the problem. However, as you saw smoke and sparks, it's possible that there is damage to the motherboard as well. Genuine Dell parts can be obtained from Parts-People.
Hello, so when I was using the laptop (Dell Inspiron 14), one of the screws fell off so when I came to screw it back on, it seemed to have pierced the Display Cable which then released smoke and a few sparks, so I removed the battery quickly. The laptop now won't boot or charge even if I unplugged the display cable from the mother board. What do you guys think I should do to fix this or at least what should I do now?
Dell Inpiron 14 Won't Boot after Display Cable Broke