Trying to use my Apple TV and all it displays is a plug it into the Micro socket
My apply TV will only display a plug into Micro USB and USB I-Tunes display, computer won't even recognise it
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The message is asking that the unit be restored by connecting it to a computer. The screen would likely also include the line “support.apple.com/appletv/restore”. If you see a warning symbol on Apple TV - Apple Support
How to do the restore procedure, that depends a bit on the exact model that you have. Identify your Apple TV model - Apple Support. Micro-USB is typical for Apple TV (2nd or 3rd generation). Those look alike. Find the model number (A1378, A1427, or A1469) on the bottom, if you’re not sure. Apple TV (2nd generation) should be unpowered during the restore procedure, while the Apple TV (3rd generation) should be powered at a certain moment. Verify that the USB cable that you use supports generic data transfer, as not all do (some are charging-only, or will only work with certain devices).