Dear Vaibhav, it is physical damaged by using sanitizer or improper handling. last year i was found keyboard and TFT damaged by same condition, than i told you please don't use sanitizer in TFT & other computer equipment. please inform to HOD about this case & get repairable approval approx cost 4500+GST. Manoj Kumar Gupta
Please send laptop in IT & it will take time.
Screen having big black spot on left side. request you to kindly take necessary action for replacement.