I was reading up on this about a year ago and also attempted it, but I didn't revive the non-booting wii, if it was because I i failed or if something else was the cause of no TV-signal, I don't know.
The procedure involves quite alot of work, and well not alot of up to date guides/mixing a few.
So every Wii nand is signed by per console keys, thus you can't just hook up a teensy or any other nand-programmer and just flash some random nand-backup, or even a fresh one created as it will need to be signed by your consoles per-console key. So if you already have them dumped, okay just build a new nand with Ohneswanzenegger. Then you could encrypt with your keys and flash that nand.bin.
Assuming you don't have the Per-console keys, then this gets trickier.
1) You need to have a wii made before mid 2008, which allows bootmii as boot2 to be installed. If your console is made after that, well then you have a bricked console, nothing to ever do about it.
2) If you're able to install bootmii as boot2, then you dump your bricked consoles nand, on the PC you install bootmii in that nanddump, then reflash it. From bootmii you dump the nand and keys. And now rebuild your nand and flash it with bootmii
Human vision is logarithmic, it's not linear. And nits doesn't tell the whole story of perceived brightness. OLED'S look brighter then LCD's even when both are set to the same nit values because of the higher contrast ratio on OLED's
"And nits doesn't tell the whole story of perceived brightness" it's not about perceived brightness it's about all HDR content in TV and movies being mastered for 1000 nits so it doesn't look right with anything lower, it's also about dynamic range
OLED's can get away with a lower peak brightness and still provide punchy HDR because of their contrast ratio. Like I said human vision is logarithmic. The higher the peak brightness the diminishing returns in perceived brightness.
@The Real Jdbye Oleds hit around 750 nits nowadays. The difference between a 1000 nit and a 750 nit isn't huge. It's only about a 4% increase in perceived brightness. Not huge at all. You'll need at least 2000 nit displays to notice a bigger difference.