Problem with iTunes restore?

Hi, today I jailbreaked my iOS7 and now I can't turn on my iPhone. In jailbreakers website they write:

Warning! Over The Air updates of iOS 7 are known to create an issue and make the jailbreak fail. Some devices are then stuck on the Apple Boot Logo. Until we fix that, please restore your device to 7.0.4. With iTunes first.

So, then my device is stuck on Apple Boot logo, my PC can't find my iPhone and I can't restore my device. What to do?

I recommend go to nearest mobile acesories shop or where there's jailbreak done in that shop you may get some assistance… Cause it is a bit natural that after jailbreak your IPhone won't work!

Okay so first plug your phone into iTunes after you have done that hold just your power and home button until the iTunes restore logo appears on your phone after that a message on iTunes should appear saying we have detected an iPhone in recovery mode would you like to restore and update click yes and there's your problem fixed. If it doesn't work the first time then try it again

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