Is there a reset for the nikon D90 and cannon 1100D when they wont turn on?

Is there a reset for the nikon D90 and cannon 1100D when they wont turn on?

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Canon Powershot G16/G7X or Nikon P7800/P340?

Hi All,
Looking to buy a good quality pocket size (or near) camera but am a little stumped as to which. While I want it to take great photos overall I do shoot a lot low light/night action shots and video.
I like to take a lot of concert videos in small venues so it would have to be really good/great (image stabilization) in that respect. Stereo sound as well. I have narrowed it down to these but would like opinions from actual owners. Thanks in advance!

Nikon P7800 or P340
Canon Powershot G16 or G7

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What is the difference between the Nikon D 7000 and the D 7001?

What is the difference between the Nikon D 7000 and the D 7001?

Read more: What is the difference between the Nikon D 7000 and the D 7001?