Cannot turn Nexus 7 on after locking the screen My Nexus 7 had been performing without any issues, however, I locked the screen by pressing the power button as usual and then tried to turn it on several hours later but it was unresponsive.

How can I fix this?
I've managed to deal with this problem by performing a "soft reset".

Hold down the power button for around 30 seconds, the device should start a soft reset (i.e. you don't lose any data/settings etc.) and reboot.

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Why it blocked and prevented me from performing a screen unlock remains to be explained.