intel - Duplication of desktop in two screens do not work

Question

I have laptop dell latitude e6430 which come with 2 graphic cards one is integrated intel hd graphics card 4000 hd and the second is nvidia nvs 5200m .When i connect laptop to tv screen with hdmi cable ,i face a problem that duplication of desktop do not work (the tv screen still black and show me message that is no signal) Although I am absolutely sure that the cable is intact and so is the screen

question from:https://stackoverflow.com/questions/66054398/duplication-of-desktop-in-two-screens-do-not-work

Answer 1

Did you change the input on tv to hdmi and the correct hdmi port number