Sometimes when my ThinkPad Yoga gets into sleep mode it becomes unresponsive; pressing the power button doesn't reactivate it, even when I do so for more than 30 seconds.
Everything else seems to be 'working' - the power indicator blinks, the Fn key is lit, the fan is working and the laptop is heated. Then the Yoga's battery is eventually drained.
I read that it is possible to do a hard reset or reboot but I cannot seem to locate such a button. Does the ThinkPad Yoga have this too?
In the event that your computer stops responding, press and hold the power button for four seconds or more.
If the computer still is not responding, remove the ac power adapter and reset the computer by inserting a needle or a straightened paper clip into the emergency reset hole to turn off the computer.
Lenovo is continuing to investigate these symptoms. As an interrim recommendation, customer should flash the latest BIOS and install the latest Intel Graphics Driver. As a recent update (Sept 2014), Lenovo also recommends updating the realtek PCIE driver