What is the problem with 15-inch Macbook Pro model 2011 after connecting to TV with HDMI chord?

Today we connected a 15-inch Macbook Pro model 2011 with HDMI chord to an Insigna Television. We plugged and unplugged couple of times. But recently the macbook pro is having technical issues. The following symptoms are:

1. Macbook pro turns on and off

2. The screen stays blue and keeps loading but does not load to the desktop so you can't access to anywhere

3. The screen sometimes becomes fuzzy and the apple logo that shows before it loads to the desktop is fuzzy

4. Sometimes fuzzy lines appear on the screen like you see on television when there's a bad signal

5. The screen stays blue

6. Sometimes little specks appear on the screen

Only thing we did was turn it off and restart but it still leads to the same symptoms above.

Does anyone have any clue what caused this problem? I am guessing it is due to the connection to the HDMI chord, since we didn't turn the macbook on and off when we plugged it, rather we just unplugged and plugged the chord while the macbook is running.

Another theory might be watching movies from an online source but the first theory seems to make more sense.

We scheduled a meeting with the genius bar tomorrow but does anyone might have any clue? And also any ideas how to fix this? This is an emergency because there are important files on the macbook we didn't back up and we hope the files are safe and we need to use the macbook ASAP. Let us know anything that might have caused this and/or any solutions or help. That would be appreciated and thank you.