PI 5 either failing to boot or no HDMI

I recently got a raspberry pi 5. All morning I kept reimaging an SD card with Libreelec and PI OS. Neither seem to either boot or show up on screen. Continued to keep getting no signal. I got Libreelec to work a couple times but it's very inconsistent. I have tried the config and cmdline fixes I've found online. Not sure if that got it to work for me. I've spent a lot of time combing everything I can find for a fix. Just not sure what to do anymore. Could there just be an issue with the PI. I bought and put it in a case because for my use case. I didn't want it to just sit on my nightstand My ultimate outcome is to get any OS working and to get Moonlight installed. The only purpose for the raspberry for me is to solely run moonlight and be able to stream from my PC to my projector in my room. Nothing more. The couple times I got libre to work. I couldn't figure out to download moonlight. Anymore information you need. I'll answer best I can.

What screen/display are you using? Have you tried to boot from a USB stick?

Was using my computer monitor. Just a plain 1080p 60hz monitor. I have tried from USB. Same outcome. As I continue digging. I'm wondering to myself if it's as simple as the HDMI adapter I'm using. I have the ONN HDMI to mini HDMI adapter from Walmart. Could that really be the cause of my issues 🤔. I ordered a new adapter on Amazon. Which doesn't explain Libreelec working for me a couple times. One of the times it worked by me inserting the sd card while in the boot menu. The boot menu showed up just fine for me.

And the second question?

I answered that too. I did try USB. Same outcome.