How to restore a bricked iphone that will not turn on?

My husband tried to update his iPhone 4s to iOS 7. Somehow in the process his phone bricked. It will not turn on, (and yes we have tried to hold down the home and power button. It does not work) iTunes does not recognize it when plugged in, and when we plug it into a power outlet nothing happens.
Is there a way to save this phone? Or should I just toss it?

When he updated he proably not have it plugged in so it not fully update
do not throw phone away
be a software issue or battery
uninstall itunes
reinstall itunes newest version and try again
sounds like battery issue
take for repair if all fails

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