NEW DISCOVERY: I think its an Aroma problem. I booted into Tiramisu and everything worked. Something there is corrupted.
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I FIXED IT!! It was just I had to update Aroma
You are not too harsh, Ethelbert. It just turns out that this slop actually helped me with the problem. So I just posted it. I did not want to make anybody uncomfortable. Your solution is way better, of course. I just did not know that.
Good news: your stubbornness is justified. There's absolutely a way, and you've actually done most of the work already. The problem isn't that console can't run this hack, it's purely a packaging problem.
First, your diagnosis is correct, and...
It keeps being the weirdest Wii U to me: I replaced CM7 and CM8. Now I have HDMI out. Could start minute via the pico and install ISFSHAX. Still, PTB is impossible to trigger. Tried 3 different SD <= 2GB all of them work on all my other Wii Us. I...
Correct. But there is no output with the serial uf2. But when I reflash the defuse uf2, defuse works. Including serial output. This Wii U just is nuts. I will check my soldering...
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Well, soldering seems fine. And as I said. I get all...
if you have defused it could you dump the seeprom? There was some value in the seeprom the sdboot1 expects. Maybe on your console that value is different.
Your diagboot1 version is 7, which should be fine.
You could flash this firmware to the pico. It will give you the output without defusing. With that we could see where the PTB gets stuck exactly.