If prodinfo is buggered, you are snookered. The only possible way to get the console r to boot would be to get the device key (think it's in ECC form) from the borked prodinfo and then you can probably create a blank one.
You can remove certs, serials etc, recompute the hashes (there are two that need to be generated) and make one that will boot as long as your device key is intact. Think it's at 0x480 offset in prodinfo
I think lockpick/ or is it that tool that blahblah made that does a similar thing.
I'm trying to recall this from memory, as I'm sat in a hotel in Spain, about 1500 miles away from home.
So double check everything I say as I'm a simpleton.
Though alas, looks like you are snookered forever if your prodinfo is completely unencryptable.
Unless atmosphere can somehow patch out the device key check? Maybe?
I got the device key from lockpick or another key extracting payload.
There is an example prodinfo that I could open and analise? such thing exists?
I have a patched switch, can I used it for anything?
I'll start to look at how all the fields are written to see If I can make my own PRODINFO.