Laptop screen goes dimmer

sosant123 Posts 1 Registration date Wednesday October 7, 2015 Status Member Last seen October 7, 2015 - Oct 7, 2015 at 07:43 AM
My HP pavilion laptop screen is so dim that I can't see anything. This problem occurs after some days after upgrading windows 8.1 to windows 10 . but sometime the display works and also works if i plug it to external screenplease help