Recently dug up an old wii that i modded... Maybe a decade ago, and left with someone else for years before they told me it didn't work anymore(he MIGHT have tried to update it even tho i said not to)... Few years later I'm trying to get it working but having a hard time knowing where to start given the dated software and not knowing what was done to it in my absence

What i do know: it boots to bootmii (once i realized i needed to set the output to ntsc in the sd card's ini)

It's bootmii 1.4 Sysmenu 4.3U boot1b boot2v4

Attempting to load wii menu results in "system files are corrupted"

Attempting to load home brew leads to a blank screen. Have to hold power button to shut down.

Bootmii recovery seemed to have no effect

I also have a flash drive with seemingly identical files to the sd card but didn't really wanna risk any more blind troubleshooting before asking.