As follow up for others who may run into it...
I reflashed Boot1/2 & raw to 14.x.x and it runs. No matter where and how I run the update on OFW it blackscreened after reboot.
Trinket mod always triggers RCM.
Either my payload chain or RCM itself prevented the OFW update from working.
After a...
I'm running latest Hekate, sigs etc. (Using HATS pack atm)
sysMMC/emuMMC are working fine so the actual data on MMC is good
Launching OFW from the trinket payload (no SD) or Hekate (with SD) results in blackscreen.
Re-installing the fw update using Daybreak under either sysMMC/emuMMC works but...
This is my situation...
Unpatched V1 switch with Trinket Mod.
I wished to update
I booted into OFW and updated 14.x.x -> 16.0.3 from Nintendo servers
Update proceeded and rebooted console. Upon reboot I get black screen.
sysMMC and emuMMC boot and work fine.
Formatting new SD card and...