glitching laptop freezes and reboots

My son dropped my laptop a few weeks ago, which resulted in the laptop glitching, freezing and rebooting randomly during use. Initially I thought I had a GPU issue due to the artifact like images I got as it froze. After further effort trying to diagnose the issue, I confirmed that it only occurred due to pressure being applied by my right hand during use. The problem seems to be hardware related as I used an external keyboard there's no issues and it works perfectly. What can cause this issue and how can it be resolved.