So lets try this and see if it helps.
Hard Reset using buttons:
Press and hold the Camera + Volume Down + Power until the phone vibrates. Then release the Power key and keep pressing the Camera + Volume Down for a few seconds.
lighting bolt and gear icon
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Anonymous
My Nokia Lumia 920 shows the lightning bolt and gear icon. does not start and is frozen on that icon.
Windows for home | Other | Devices and drivers
Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.
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Anonymous
Answer accepted by question author
Anonymous
A HAD SAME PROBLEM TOOK OUT MEMORY CARD ATTACHED TO LAPTOP AND PRESSED VOLUME <DOWN> AND POWER BUTTON AND IT CAME ON
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Anonymous
2015-07-31T06:59:54+00:00 The lighting bolt and cog has not went away as of yet; since I reset my phone due to when I touched the screen; yellow boxes would appear and I could not shut down the phone.
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Anonymous
2015-09-01T17:02:02+00:00 I just popped the battery out, put it back in, and pressed the power button. Started right up. Whole reason why I will never buy a phone without a removable battery. I have a Lumia 822 and wouldn't trade it for an upgrade unless the new phone had a removable battery.
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Anonymous
2015-09-15T08:57:33+00:00 I have had this issue when doing the Windows 10 preview update.
The only way I can sort it out as the hard reset button procedure will not allow me to get to the exclamation mark and the nokia and Lumia recovery tools do not work.
I use the Windows Phone recovery tool, it gives you the option to say your phone is not recognised and then plug it in and force a soft reset a couple of times and the program will see your phone type, and allow you to download the software package for it.
Once it has its a case of reconnecting phone and resetting a couple of times and the program will force a recovery on it.
This is where I have ended up after hours of internet searching and frustrating button presses on my nokia 1520 which wouldn't work or allow me to get to the exclamation mark.