This is a little project I worked on from October 2024 to January 2025 with help from Skye and HoneySoakedSegull. Original idea by Siktah (he had been nagging me about this for a year). Before anyone comments or asks, yes this just transfers the solder skill requirement from the repair person to the board assembler/merchant. This isn't something everyone needs, and I think it's rather pointless, as I just do my own trace repairs. That being said; not everyone has precision soldering equipment, not everyone has fantastic magnification to do their solder work, and not everyone has the effort for traditional front panel trace fixes.
Without further ado I present Hugin and Munin trace fix cards and the D0-ET board.
Siktah and I entered these as an exhibition entry into Xbox-Scene Modfest 2024:
https://www.xbox-scene.info/articles/xbox-scene-modfest-2024-celebrating-homebrew-innovation-and-the-modding-scene-for-xbox-xbox-360-xbox-one-and-xbox-series-x-r54/
The boards are to be used in pairs, 1x Hugin (A) board and 1x Munin (B) board per repair. all 1.0 and 1.1 boards use one set of boards, all 1.2-1.6 boards use a different set.
They require a 25cm ish 0.5mm pitch, 4-pin flex cable to jump between the two boards, and you only enable the trace repairs you require on the Munin (B) board. The flex connector must be folded 90 degrees one time to for the contacts to like up correctly. The red front panel LED is the least likely trace to fail, but it also doesn't have nearby "friendly" test points either. So a wire going from the RED pad on the B board to an alternate test point on the motherboard will be required. Unfortunately some boards don't have an easy to solder test point for the Red LED, so it may be easiest to solder right to the SMC. I am currently writing up install instructions and gathering fresh board images for every board rev. Here are some early "quick and dirty" images for 1.4 and 1.6:
I made the FPC connectors quite large to support a huge variety of connectors, though I do include documentation on the bottom of each PCB for the needed resistors and a compatible FPC connector. You can also use top only, bottom only, or top+bottom FPC connectors as long as you use a "reverse direction" flex cable with one set of contacts on the top, and one set of contacts on the bottom if you use top or bottom only FPC connectors.
As an added bonus, EqUiNoX repeatedly requested a simple, multifunction D0 board. So alongside Hugin and Munin I designed D0-ET as part of this set.
Aside from protecting your D0 point from accidental damage from pulling on a wire the D0-ET (pronounced duet) has 3 possible functions:
grounding out the D0 point directly
giving a larger pad to solder to, to connect to a modchip with a simple D0 pad like an OpenXenium, ModXo boards, or an X2 / X3 wire harness
giving a JST-SH 1.0mm 2-pin connector to connect directly to a modchip like Xenium Ice, Xenium Gold, or various ModXo boards
An earlier (less well fitting) revision of this board can be seen installed on the 1.4 motherboard picture above.
I am finally learning more about git and specifically github with the release of the Skeleton Key branded USB adapters (based of xbox7887's USB adapter, with support, permission and an overly permissive license). https://github.com/OGXHarcroft/Xbox-Skeleton-Key-USB-Adapter
The gerbers for all 5 of these boards are already on the Xbox-Scene discord in the Modfest channel as of roughly 6 months ago and some sellers have already started selling them. Hugin and Munin FP Trace Fix boards are also coming soon to a github near you!