I assume the device is running - the USB would be needed to run device tool for bypassing activation. Therefore dev mode should be accessible whether it is currently on or not, but yes, my assumption is that first access to the file system is using Novacom over USB - once Preware (or other filesystem access app) is on, then maybe, but otherwise, no.
I probably shouldn't say this, but as Thibaud is working to install OSSL using an OTA process, it might be possible to spoof an update signal over wifi and install Preware as an OTA update, but this would likely involve HP authentication keys that are not available. Additionally, someone would have to implement this and I doubt anyone will bother because that effort likely exceeds the effort of cracking the case and warming the soldering iron...
- Research how to open the case & fix it yourself.
- Or take the info to someone who will do it for you.
- Or sell to one prepared to repair it.