So the past couple days it's been raining really hard where I live, and I was at college earlier today, walking to the library, and I walked out onto a wooden deck for one of the bridges that connects between the academic buildings and the library building (I had just left class and was going to the library to study), and unbeknownst to me the deck was very wet (it was a dark wood and the water blended right in), and I immediately slipped and fell to the side, hitting my head on the pavement and my laptop bag slamming down below me and then I landed on it.
Now my laptop's monitor section has a dent in the metal on the back of it, there's a small red smudge in the pixels in the center of my screen, and worst of all, the computer sputters/lags every half-second whenever I play any game, with audio becoming scratchy/distorted at every half-second spike. The computer also seems to be experiencing significant input lag at times.
I'm not sure how to diagnose my computer, does anyone have any recommended programs for detecting hardware damage, and if possible also, does anyone happen to know what might be the specific cause of my computer's sputtering?