Its saying if i don't want to accept an upgrade i can shut down my wii console and if my wii console has an unauthorized technical modification, this upgrade could cause inoperability of my console.

Sounds like you accidentally bought a hacked Wii. When you upgrade the firmware found the hack and now your Wii may be bricked. Try this: while holding down the reset button, turn on the power to the Wii. If a menu comes up then your wii is definitely hacked but it has a brick safety program to get you out of it. If nothing happens then you may be out of luck. Since you bought from Korea and it still allows you to play it in America then there is a good chance that your Wii is modded. I would say return it to the person you got it from but that seems to be out of the question.

Press Ok, Accept or replay

I have a solution for this

Bruce

You will need a modification chip to read the different format from copied disks. Otherwise check out videogameall.com/ps3swapmagic.html this updates programming to accept other formats and avoids hardware upgrades and is fairly cheap.

There is no need to have technical knowledge to do fix this problem.....Just get repair guide from internet and follow the steps in it and fix your problem by your own.......

Click here to download repair guide

This is a technical problem than only Nintendo could fix. Call them and they will either tell you how to fix it or they will ask you to send it in and they will fix it themselves.Also, you cannot upgrade the disk channel. It is hardly even considered a channel because all it does is start your game.

This usually means the Wii was modified to play other region games and Nintendo has locked it out. In other words, the mod used no longer works and will need removed or replaced.

While holding down the reset button, turn on the power to the Wii. If a menu comes up then your Wii has been modified and won't work again until the mod is removed, assuming if it can be removed.

There is a decent blurb about it here, including instructions for users of Homebrew Channel and Loadmii. I neither use or endorse use of these modifications as it is against Nintendo's AUP/Service Agreement.

You will need to remove all unauthorized software from you Wii console.

1. Press and hold the POWER button until the Wii shuts off and the power LED turns red.
2. Press the POWER button again to restart the Wii.
3. Go to Wii Settings and run Wii System Update.

The latest update will remove all unauthorized software for you and should return your Wii to normal operating status.

Ii may be lens problem.If you have technical skills open the console and try to clean lens with piece of cotton and some alcohol.If not help you need to change the lens.

It is possible that you updated your Wii with a new firmware that was available on one of the game disks. Some modifications do not work anymore after a firmware update. So it might be possible that you have an older modification that Nintendo overrides with a new installed firmware.
It is almost sure that when you remove the modification completely, your Wii is working fine. If so, install a recent modification that is immune for these firmware tricks, dor example the D2Sun

when i turn on my wii it flashes all colors and then it shuts off.

iv tride unpluging and pluging it up