I don't know what to say then. Only thing I could think is maybe it's the sd card that's the issue,but you said you tried 3 others with the same results. Unless all of them are the same brand.
im not sure but isnt JoostinOnline 's BLIND similar to cBoot2 ? wthis could be of assistance.
http://www.hacksden.com/showthread.php/2591-B.L.I.N.D.-The-new-way-to-fix-bricks!



BLIND Looks to be a modified any region changer.
cboot2 you can choose any app you want to run i believe.
icebrg5 if you scroll through the topic for BLIND joostinonline even says it's source code is taken from several pieces of homebrew to make a brick fixer and i'm pretty sure if joostinonline was asked he'd be able to make versions that autoboot to other display modes for an all-around wii brick repair software

try downloading the newest hackmii installer and try using bootmii to load the mini dol to load the installer the file is called bootmini.elf hope this helps I don't have a boot2 bootmii installation mine is ios, so i'm just throwing out a suggestion.





i went back to my working SD card with BootMii v1.1, but this time, i extracted everything except the "bootmii" folder from the B.L.I.N.D. zip file.
selected the third option (SD card icon), and then scrolled through the list of files for "boot.dol" on the root of the card.
and i got this message."Failed to boot selected file!"
am i doing that right?