Lenovo YOGA Tab 3 Pro 10" YT3–X90F User Manual page 32

10 seconds until the device turns off. Then switch it on again in normal way.
The device cannot access the internet via wireless network
Restart the wireless router or go to Settings and restart WLAN.
The device cannot wake up from sleep mode
Please hold down the On/Off button for more than 10 seconds until the device turns off. Then
switch it on again in normal way.