A few years ago I attempted a homebrew exploit on my Wii U but never finished it. I believe I backed up some files at the time but no longer have them. I am not sure exactly what state I left the console in but after that it never turned on again. The disk drive would not spin and the console would only show a blinking blue light that went red. I assumed it was bricked and went straight for defuse.
I soldered a Raspberry Pi Pico W to the Wii U motherboard following the defuse wiring diagram.

Here is where things get interesting:
When I loaded isfshax onto a FAT32 formatted 1 GB SD card I heard the disk drive spin and got a solid purple light. During this attempt the Pico was not connected to my PC, only to the Wii U motherboard, so I had no monitoring output to my computer. I had assumed I would get video output into the minute menu via HDMI but got nothing on screen.

After researching further I realized I needed to use boot1.img and fw.img from the official defuse repo instead. I flashed boot1.img using dd to the SD card and copied fw.img and the wiiu folder to the root of the FAT32 partition.

Current situation:
I am now getting a blinking purple light instead of solid purple. From the README I understand this means fw.img is not being found on the SD card root. I have confirmed fw.img is at the root of the partition.
Serial output via minicom is attached. I can see defuse completing successfully with the correct 01 02 03 sequence and Winner output, however I cannot get solid purple or access the minute menu to dump otp.bin.

My goal is to dump otp.bin via PRSHhax so I can boot IOS and fully recover the console?

Any help would be greatly appreciated. Thank you.