@YoKelly I have the very same problem with a WUP50 mainboard. I have no solution so far. It is strange. I could install ISFSHAX using defuse, but still no chance to trigger PTB.
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.