Toshiba Satellite C-70B external screen issues Windows 10

Hello everyone. I always hook my laptop up with my TV with a HDMI cable. Today, when I came home from the gym, my laptops screen was black (because I didn't move my mouse or pressed any keys) and my TV screen was black (because he hasn't sensed any activity for X amount of time so turns off). When I turned my TV back on it said that it doesn't have a signal. Ofcourse I tried going to display settings and I saw there was only 1 screen and no other external monitor.

So first I tried unhooking and replugging the HDMI cable and putting it in different ports, still no signal. After that I've tried looking for driver updates (Intel HD Graphics) and there were none. So I've made an attempt to do a system recovery and I still have no signal. I even changed the HDMI cables (I have several). I've hooked my neighbors laptop on my TV and his worked, so it's the laptop.

So 1 note: my laptop has been having some screen trouble when starting up sometimes. It would look like the VGA is broken or something because the screen would be half covered in green. Within a minute it would turn back to normal. I've asked the computer mechanic what the problem could be and he told me it's probably the connection between my laptop monitor and the laptop itself. And if I were to connect it to a external screen, it should have no trouble, and it didn't. However all of the sudden now it fails to connect to my TV.

Halp. Plz.