I couldn’t flash it through dfu.exe. It didn’t show any info regarding the HMD so I gave the DfuSeCommand.exe a go instead.
Here’s a quick “howto”:
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Unpack DFUupgrade.zip somewhere (remember the path - You can copy paste it later when cd’ing to the directory)
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Place firmware file in same folder af DfuSeCommand.exe
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Enter DFU mode on HMD
Hold all three buttons on the HMD (must be in off mode when starting)
Release the power button after 8 seconds
Release the volume up button after 8 seconds
Headset is now in DFU mode (led cycling through different colors) -
Open a command prompt (cmd.exe)
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Change to the directory where You unpacked the DfuSeCommand.exe (cd C:\path\to\DFUUpgrade directory) - right click for pasting the path
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Run DfuSeCommand.exe 0 <firmware_file.dfu>
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Power cycle HMD
Download the tool here: