Dell webcam blinks

Whenever i move my laptop lid up and down by remaining my web cam application open the webcam light blinks and the application says error And my other problem is that my keyboard behaving abnormally it starts writing automatically like slashes and dashes and sometimes it also even stops to work sometimes and many key become non functional  iam using win 10 64  bit .my web cam problem is an old issue but keyboard one is new.

Please help iam in a big trouble .