IF YOU GET AN ERROR TRY TO FIND IT AMONG THESE BEFORE POSTING
SD/USB Loader Error: Corrupt ISO. Most likely patched incorrectly (you don't have to patch region when using USB Loader).
SD/USB Loader Error: Hardware not recognized. Most likely have a cIOS installed incorrectly, out of date, or missing. Possibly formatted the SD card or USB incorrectly, is unsupported, or not enough space.
Q. I have formatted the device correctly but I am still getting this error; how would i fix this?-1:
A. Be sure to have the device hooked up to the Wii before you power it on. You may lack USB support as well. Installing a newer cIOS 249 would clear this up.(cIOS249  d2x-v6
Wad Install Error:Most likely you have cIOS installed incorrectly, out of date, or missing.Your SD card is not Formatted as FAT16 or FAT32 properly, reformat it. If a file was needed, then it was not in the correct folder.Each application needs its files in specific folders, so pay attention to that. Can also be a bad wad or not enough space on the Wii. (example: If your installing cios38rev17 offline make sure you have ios38-64-v3867 on the root of your sd)
SD/USB Loader Error Partition not Found: Most likely have a cIOS installed incorrectly, out of date, or missing. Possibly formatted the device incorrectly or device is not compatible yet.
Unauthorized Device Detected: Most likely outdated firmware for your modchip. Possibly an outdated or missing IOS. Update to latest ios249(cIOS249  d2x-v6)
DVD Read Error / Anti-piracy security: Most likely old or missing cIOS.
Q. How can I fix this?003:
Install a newer IOS 249(cIOS249  d2x-v6
).Update your Loader all new revisions of loaders have ability to enable 002 Fix.
Unauthorized device on 4.2/4.3+: This error is found on region changed Korean wiis that have been updated to system menu 4.2/4.3+. System menu 4.2/4.3+u/e/j call a new ES Ioctlv(0x45) which has been added to system ios70/80+. This call returns a 0 on region changed Korean wiis resulting in this error. It is reported that Nintendo will not service this error. The only know fix for this error only works for wiis with cIOSCORP/DARKCORP installed, and is found in this GUIDE. This error is simple to prevent, like all modded wiis, region changed Korean wiis should never update from Nintendo higher than SM 4.1. In addition, these region changed Korean wiis should install cIOS70-v6174.zip, cIOS80-v6174.zip, and cIOS90-v6174.zip, which will prevent error 003 on region changed Korean wiis should they update to 4.2/4.3+ by mistake. DON'T UPDATE.
Loading unauthorized software:The error code you received indicates the system is attempting to load unauthorized software.You will encounter this error when you try to run bannerbomb exploit on a 4.3 system.[4.3 Softmod Guide]
Installing/Uninstalling WAD's/Downgrading/Region Changing: If it's a WAD files ticket just reinstall the WAD and then uninstall using Wad manager v1.7. If it's a missing ticket due to a downgrade or region change then you may have a bricked Wii. Try to reinstall all IOS's from original sources then run IOS Downgrader or dont downgrade at all, its not necessary.
Network Connection Error:Failed to connect to the internet or previous installation failed.
DVD Read Error: Bad burn/media or no cIOS.Use DVD-R Discs burn at slow speeds(2x or 4x) using imgburn.
DVD Read Error: Bad burn/media or most likely missing cIOS.Use DVD-R Discs burn at slow speeds(2x or 4x) using imgburn.
DVD Read Error: Bad burn/media or missing cIOS.Use DVD-R Discs burn at slow speeds(2x or 4x) using imgburn.
DVD Read Error:Bad burn/media or missing cIOS. May not be compatible with certain versions of backup launchers,new revisions should fix this.Use DVD-R Discs burn at slow speeds(2x or 4x) using imgburn.
DVD Read Error:Bad burn/media or out of date cIOS. Possibly a computer issue.
Q. If it is a computer issue, how do I fix it?1016:
A. First, make sure the type of media you're using is compatible with the Wii and/or your computer's DVD Burner. Make sure you are using DVD-R discs, seeing as they are most compatible. Verbatim DVD-R discs burned at 4x work perfectly.
IOS or cIOS Downgrader issue:Restart/Reboot your router.Check to see that the Wii is able to connect to the Internet! If it can't try and change the broadcast channel to either 3, 6, or 11.This is no longer required and should not be done.
IOS Installation Error:Most likely using an old or incorrect cIOS or the IOS you're trying to install cannot be installed on top of another.
Q. How do I fix this error?1020:
A. Fix it by installing a newer IOS 249(cIOS249  d2x-v6
) than the one you already have,if you don't have it, try installing it.
Wad Install Error: ConsoleID mismatch
Wad Install Error: Content did not match hash in TMD
Wad Install Error: Memory allocation failure
Wad Install Error: Incorrect access rights
Wad Install Error: No ticket installed
Wad Install Error: Installed Ticket/TMD is invalid.
Title with a higher version is already installed: The cause of 1035 error is when you try to install an IOS with a lower revision over-top of an IOS with a higher revision. Most common reason people get this error is when they try to downgrade IOS15 using DOP-Mii, TBR, MMM.....any app that downgrades IOS to install a patched IOS36 (you can also get the error if your IOS36 revision is too high when it comes time to install the IOS36 with patches).
2 causes - 2 Solutions
Cause 1 - using an app like DOP-Mii, TBR, MMM that does not support the IOS revisions currently installed.
Solution - Fix it by using MMM 13.4
Cause 2 - Trying to install over an IOS with a higher version number
Solution - Fix it by using IOS236 to install with (or cIOS38 rev 17).
Update Error through waninkoko's firmware updater: Required sysversion(IOS) is not installed .Caused if System Menu ios was not previously installed.
1048, 1053 & 1101:
DVD Read Error:Bad burn/media or incorrect cIOS.Update or Use Neogamma R9.If you are already using Verbatim DVD-R burned at 4x try at 2x.Also this error will persist on newer wiis, meaning that they have the new D3-2 Drive chip which cannot read backups at all.Only option for them is USB loading.
DVD Read Error:Bad burn use a better quality disc(Verbatim DVD-R) burn at 2x or 4x using imgburn.Could be a bad iso dump.
DVD Read Error:Bad burn/media.Dirty Lens use Wii Lens Cleaner.Trying to play a Dual Layer game with rev14- update to cIOS249  d2x-v6 .Some old wiis are known to have problems with dual layer games.If its a new wii then it has a d3-2 drive and you cant play disc backups.Only option is USB loading.
DVD Read Error(Disc ID):D3-2 Drive USB Loading is your only option.
Installation Error: Most likely installed incorrect or out of date cIOS.
Q. I can't install any IOS, I keep getting an error. How do I fix this?4100:
A.Use this guide
to fakesign(trucha) ios36 then use it to install other ios or install ios249 then use 249 to install other ios.(.wads)
Title Identification Error: When using DVDs, most likely bad burn or media. As for wads, most likely an incorrectly injected wad (.dol and rom injections).Wrong Ticket-, Cert size or invalid Ticket-, Cert data
Q. I injected the .dol/rom the same way I do all my injections. What am I doing wrong?
A. You'll need to make sure the account you're using has all permissions. If you're running Vista, you may want to right click on the program and click run as administrator as well.
This installer can NOT continue!
There is no known vulnerable IOS installed on this Wii.
Please note that we will not use a fakesigned IOS Due to security reasons.
Hackmii installation failure: It is a bug installed by the Hackmii team, which prevents Hackmii running under a fakesigned ios.You will most likely get this when you are trying to install hackmii with a modified ios58 or ios61 with trucha bug or any other way.FIX
Upside down HBC problem:
Again, Hackmii team prove their dislike for pirates. This will happen when the ios HBC runs on is trucha signed(press home button in HBC and it will say in top right corner which ios it uses) .Installing a clean ios the HBC use will fix it.
Source:/dev/es - WiiBrew