Boot it once, don’t let it ever fully power down (suspend is fine).
If your V1 is on firmware 3.1 or 4.1 but does not work with the RCM jig and you have run your serial ID through the test site and it comes up as “possibly ipatched”, you might be able to use “online boot” via Pegascape, which you can also host locally (eg.: in a raspberry pi) and there is at least one alternative frontend. It’s pretty much the only way to boot an ipatched > 3.x into hekate without a hardmod, and even then it’s only limited to firmware 4.x that I know.
(On such a setup, you’d then install an eMMC partition for CFW with the firmware you want, eg.: 16.x).
Never have been. </astronaut-meme>