Unable to Connect laptop With TV

Hi, i have dell g15 laptop. I have been trying to connect my laptop and sony bravia tv. I am getting a pink screen on my tv when i connect it with laptop. I was able to get video output few times, but onky for few seconds. Not even it is not working.I tried the following

_changed cable

_ reinstalled windows

_ updated and checked all drivers

_connected to charger

_ changed resolutions

Etc. Still unable to get vidoe output( i have audio output though) 

I connected the same laptop with another monitor (not a tv) and got video output. 

I connected another laptop with same tv and it was working

I contacted dell support and they are unable to help. I contacted tv customer suppott and told me that it is not an issue of tv I dont know what is happening, please help me. I am attaching the picture of tv when i connect with laptop.