akira2800

This may sound silly, but did you set the speed correctly? Records play at 33 1/3 rpm or 45 rpm. Set the speed accordingly to the record.

Try putting your phone into DFU mode. To do that press and hold down both the Power and Home buttons until you see the Apple logo. After it appears, let go of the power button and keep holding down the Home button until you see a screen that says to connect to iTunes. Plug it into your computer and it should say that your phone is in restore mode. Click on Restore and see if that works.

The logic board is shorted out and I recommend you replace the entire phone.

You're probably not in range. Wi-Fi connections only have a range of about 300 feet. Anything beyond that will cause the problems you describe. Ensure you're in range before attempting to connect.

Since the cameras are connected to the board, disconnecting the cameras will cause the phone to not work. Just power it down.

It's probably the GPU. Unfortunately, it looks like the phone cannot handle gaming so well. Try updating and see if that helps.

I recommend replacing the battery with a genuine Samsung battery.

When you plug the MagSafe adapter in, you should see a green light come on the connector. If not, try it on another Macbook. If it works, then probably the MagSafe port on your Mac is probably bad.

The entire motherboard may be damaged. It may be expensive to replace. I recommend either sending it out to Nintendo or just go out and buy a New 3DS XL.

The Lightning port is soldered onto the logic board. Unfortunately, when the port goes bad, you would need to replace the entire phone. Getting a replacement logic board would cost more than the phone itself. Currently, there's no way to repair the Lightning Port short of replacing the entire device.

The screws are T9 Torx Security.

The majority of the screws are T9 Torx Security. You’d need a T9 Torx Security screwdriver to remove them.

The majority of the screws are T9 Torx security screws.

The 9.7" iPad Pro has USB 2.0, unlike the 12.9" model. Still the display is better, as are the cameras. The A9X is clocked at 2.16 GHz and the RAM is 2 GB. This was probably done because of the smaller battery.