I have just accepted a prompt to update Apple TV, both steps completed, however the unit power light is off and displayed on my tv is a symbol of the applle tv with a USB and iTunes icon, what do I do next, I do not have the small USB connection
The device is in recovery mode due to a failed update. The only resolution is to restore via ITunes on the computer.
A microUSB cable is fairly inexpensive, or you could take the device to the Apple store and see if they can assist with restoring or replacing the device.