Wii got bricked on its own! Need someone to help fix it!

[Toastypk]

I haven't used my Wii in months, the most recent point I did is before the announcement of having the Wii multiplayer wifi removed. I decided to switch it on again, because I rented Pokepark and Pokepark 2 so I could get the data files from it to make Brawl stages or Mario Kart Wii stages from map data and ask about how to get map data from.

But once I switched the Wii on, it shows the safety screen, I hit A,

"The system files are corrupted.
Please refer to the Wii Operations Manual
for help troubleshooting."

I'm freaked out. I'm looking online, it's seeming like this is a brick, and I have no clue how to fix it.

-Things I know:
My Wii's blue light had been on, like it's the wii message center saying a new message, presumably that Wii Wifi is shutting off, it's been like that for months
-I had my Fortune Street disc in the Wii
-I had my SD card in the Wii
-A powerout happened weeks ago, that shut the power off to the Wii
-I had/used custom channels, like riivolution, and emulators. But I only used the emulators one maybe once or so. Regardless it would appear in the play stats.

Even removing the disc and Sd and trying to start the wii in maintenance mode, it won't even load that. It takes discs and ejects discs fine, but it won't load anything. Once the safety screen text starts to fade out, it freezes for a sec once the words are almost black, and it shows that screen.

I never installed anything like Bootmii or any other preloading software, because that seemed too deep into wii files to want to edit; I really only wanted homebrew channel and other things, but I've looked on the Wiibrew how to fix site, and it says that if you didn't install anything like that, you're pretty much screwed.
But I really don't want to leave my Wii like this, I don't want to install homebrew on my WiiU because that's something Nintendo could see, plus it's with a Nintendo network id thing so it's more involved.
I also really don't want all my save files from the Wii to be stuck and lose all my progress for everything I've played on it... but it seems that if I didn't install some preloading thing, I'm about stuck.
It's like the only other option is to send it to Nintendo, but that would cost, and they would probably get annoyed at seeing Homebrew on it, plus I would likely lose all my save data for Wii games.

If I have to open my Wii for some reason or do something else with it like any chips or something, I'm almost ok with that if it will fix it and get Homebrew working again.

The Wiibrew help forums aren't very active, and this is the only other place I know that could really help.

Does anyone know what to do? Thanks.

[Rosetta-Hime]

I'm at least 90% sure Homebrew voids the warranty on the Wii. Sorry friend, I don't think there is anything you can do to fix it, besides getting a new one.

[Toastypk]

I'm not talking about warranty, I've had it for years. But there has to be something I can do to it, even if I have to open it.

[windhunter7]

If the Wii menu boots up fine, but this error:

"The system files are corrupted.
Please refer to the Wii Operations Manual
for help troubleshooting."

appears when trying to load a disc, I had this happen to me once; it turned out that the disc reader was dead and we had to get a new one; I found a tutorial on how to replace it, and bought a new one, and my dad and I replaced it. Is this your problem? If so, you should probably get a new disc reader like I did, or just get a new Wii.

Prices: Disc Reader-about 40 dollars; Wii-about 80 dollars

[Toastypk]

It doesn't even load the main wii menu. Only the safety screen. Once you press A to try to load the screen, it shows the safety screen becoming black, but once it's almost black, it pauses a sec and shows the System Files message. It doesn't seem to matter if I have a disc in it or not. Maintenance mode doesn't seem to load either, same message.

Reading online, it seems like the only answer is to use a NAND reprogrammer, but that's really involved and expensive and needs soldering. Someone could probably fix it, but I pretty much couldn't...

I'm wondering if it's because of the storm... the power got shut off because of it, but came back... and back off again. This happened a bunch, like 8 different times.

[Makarew]

I've had this happen multiple times. I just unplug it for a few seconds and plug it back in.

[Sonic Exodio]

Or you could unplug it, and install priiloader