OK then, I have two DSi's for my kids.
DSi 1 was running 1.3 of the firmware
DSi 2 was running 1.4.2 of the firmware
Both DSi's were updated to 1.4.3U. Dumb I know but that's kids for you
Now DSi 1 is still working fine with my R4i V1.4.3 / Firmware of 1.54b
However DSi 2 does not work. I...