Thanks Meter 1913
Join Date: Aug 2012
Location: Springfield, Massachusetts
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The factory image in .tgz format needs to he extracted in platform-tools folder assuming you're using the SDK (I used WinRAR to do so). Open up Command prompt and CD to platform-tools and type in fastboot flash-all while connected to USB in fastboot mode (you can also try typing just flash-all.sh ) It'll begin writing and you will lose everything.
Proud owner of LG Google Nexus 5.