Try this (I to had reset my WI-FI this way because it would not turn on)
1. '''POWER DOWN''' the device.
2. '''PRESS and HOLD''' the '''RESET''' and the '''ON/OFF''' keys until the device powers up.
(Your '''RESET''' should be a '''SMALL HOLE''', usually '''NEAR''' the '''POWER''', but make sure that you '''ARE NOT''' pushing on your '''MIC'''. That might damage your device. If you're not sure where the reset is, remove the back cover and check what is by the hole you are considering. It should be a small switch if it is the '''RESET SWITCH'''.)