Cracked screen

I recently dropped my g2 and cracked my screen. Screen is still working except a small part. The problem is my phone is heating up a lot. Could it be from the screen. If replace the will that do the job or there could be something else wrong.
Just thot someone could share their experience
Also the phone is now losing battery quickly and charging slowly probably due to the heating.
It only heats up at the top where the motherboard is located espeacially where you connect the touchscreen. Also the screen crack is also at e top just next to the speaker.