Hey Adeel ;
I can see the back light is being blocked by full contrast from display . Did it drop hard? was screen replaced ? If it were me I would find a tear-down video and double check any of those ANNOYINGLY small connections . Dunno if it will be a case of reflowing the “lead” free solder with heat . Severe drop can crack mobo tho .
Factory reset procedure should not be bothered with , unless you dont care and are curious if it helps . I dont think that would do anything .
PS ! caveat ! reset may cure accidental screen bright down to zero . In a dark room can you see any hint of images ?
Good luck
Hugh