Hi Fixits, I recently replaced my screen (without frame) on my Nord N200. After putting everything back together and...

Which screen are you using to replace the old one. If its an off brand one that could be the problem. People sell cheap LCDs that most of the time dont work and are crappy. Make sure you have a good one, if you dont then you should replace it.

The iPhone 12 Pro Max screen might work. Its basically exactly the same apart from the slightly bigger notch which shouldn't cause a problem. Do some research though before you buy it.

Something could be jammed in the speaker or there could be alot of dust/crud build up in there. If its not clean try to clean it with a toothpick.

Depends on what switches you have. If the switches let light through to work, then something might be blocking it, If they arent then something else might be wrong. I would suggest taking it apart if you have some tools (screw drivers). Look to see if anything is disconnected, if its not then take the PCB and switches out and then put them back together. That should work but it's not guaranteed; If it doesn't then you should just replace the keyboard. I hope I was helpful!

Hi, I've had the same thing happen to my headphones. What I did was I wiggled the left earpiece around until the right sound turned on; It would only turn on if it was placed in a specific way so every time I use them i need to wiggle it. If you want to fix it permanently, you could try opening the left ear cup and checking if anything is disconnected, because that is usually the problem. Hope I helped!

I havent seen this happen before, but what I would do is try to force reboot it. (Dont worry it wont delete any of your files) Hold down the powerbutton and either of the volume buttons. Keep holding until the samsung logo shows up, or the screen turns on. If this doesnt work you might have to replace your LCD.