My 9a running graphene has become corrupted and unable to boot. I've attempted to find my own way but after running into a dead end I need some help.
My only hint at what happened is that it ran out of battery while an update was pending, waiting for a reboot. I assume it tried to apply that update while the phone lost power and broke something.
I have charged it up now and found this post: https://discuss.grapheneos.org/d/12814-fixing-the-your-device-is-corrupt-error-after-power-loss-during-system-update
I have installed fastboot but the command fastboot getvar all is just stuck waiting for a device. Putting the phone into fastboot mode does not get this command to run, despite the pc detecting it.
In fastboot mode, it displays boot slot B. I'm unsure how to verify if slot A is still working, but I have tried recovery and fastbootd with no success. I'm not certain if that's an accurate way to check slot A though, or if I did anything of meaning.
I have not attempted to apply an update from ADB, as I have seen it mentioned in some places but haven't seen a clear set of instructions to be certain I do it right when the phone is in this state.
Please help!