Harold

I have reset the phone multiple times and tried it on multiple carriers. It will sucessfully place the call, and the...

Replaced the entire display and now i get NOTHING. Don't know where the backlight chips/assembly is. There is no backlight...

Red screen is usually indication of bad hardware, most common culprits are battery and screen

If a system update and restore doesn’t fix it, I would try replacing LCD. If that doesnt restore funtionality, its probably motherboard damage.

I’ve seen a number of devices that have hardware stop working after upgrading to ios 12. Batteries are most common, but if it happened after the 12 update, I would NOT anticipate that a restore would return functionality. Take it to a reliable repair shop with some integrity and you should be out less than a hundred dollars and the repair is quick, or if you’re comfortable/daring enough. buy the part and follow one of the guides for repair. If you see anything that looks like chalk/toothpaste on any connections, clean VERY well with alcohol and swab. I mention this because the number one reason I replace customers front facing camera is because the earspeaker area got some moisture in through the mesh and doesn’t kill the whole phone, but certainly causes issues.

If you have a screen available, try it out in a new screen. The ribbon that runs from your button to the board is part of the screen (unfortunately). That ribbon being damaged would actually be the cheapest fix, so hopefully that helps. Replacing the button or the board would be expensive.

If you are comfortable opening a phone, you can actually remove the earspeaker on the note 8 prior to cleaning so that you dont damage it and you wont have to be as gentle with the mesh.

Make sure you have a working data connection, whether it is cellular or wifi, otherwise it cannot contact the server.

I work at an electronics repair store, most of the time the solution is either a new sim card, or reset network settings (you'll have to reenter wifi passwords, but your phone will probably work, worth it).

I would try another screen (if you have one). just sounds like a little to much/little solder on the screen (not plug) side of the connection. Trying this first will likely save you a lot of wasted time on software troubleshooting.