I'm looking for some help when I boot up my pc nothing displays on the screen. I've tried a bunch of things to resolve the issue.

I've tried 3 different tvs
3 different hdmi cables
I've tried a DVI cable
I've tried reseating my graphics card and ram
I've took out my graphics card and tried just using my onboard graphics

The tv(s) are connected to a wall outlet
The light to the tvs are on when I've tried booting the pc
Whenever I've tried plugging an hdmi cable in the pc the message I get on the screen is that there isn't a connection coming from the computermonitor or tv? anyway...let us see:
1. do you see picture if monitor is connected? via vga, dvi or hdmi cable to pc?
2. do you see picture on tv without pc connected (just normal tv programs?)
3. do you see picture if you connect any other pc or laptop to tv/monitor?
4. did you try with windows+p KEYS to switch between modes?
5. what happens if you have picture on monitor only and then plug the hdmi cable to tv?Have you ever done this before?
There are things s that can MAKE it hard to do.
Have you tried another computer?
Have you tried a tablet with HDMI?
Here is a GOOD tutorial:
https://www.techsolutions.support.com/how-to/how-to-connect-a-windows-laptop-to-a-tv-over-hdmi-12554

Does that help?