HDMI external monitor not working [Linux Lite 4.2]

[lite noob]

Try this PPA here:

Code:

sudo add-apt-repository ppa:oibaf/graphics-drivers
sudo apt-get update
sudo apt-get dist-upgrade

Reboot.

Thanks, but that didn't work out. Is there a way I can check that those drivers are the ones my system is using? My lspci -k -s 00:02.0 command is still reading I have the i915 driver even after adding that ppa and upgrading it.

Also, I tried out with a newer TV, which actually worked fine. Back when my laptop had Windows on it, I was able to duplicate and extend the screen with my "old" (non-working) TV. So this has to be something with the drivers.