Restoring to stockish for a warrenty (GEN1 OLED)

[Guest Blake Loring]

Hi, I'm having issues with a non-responsive power button which I assume is fault and I'm gohna have to send it to Orange.

What will I need to flash onto a phone currently running clockwork mod and Cyanogen? Are there any links to something I can just flash through fastboot or is it finiky to remove all the customization.

Any assistance would be greatly appreciated thank you.