I have a 3.0U NTSC Wii. When trying to create a GCOS multidisc, with the 1.9b update and the 1.3 config disc, I would recieve the "check connections" error when attempting to update to 1.9b. I read about every forum I could find and tried the "eject trick test" - which does absolutely nothing by the way. I read that it meant I had a "clone", that I didn't solder something correctly, blah, blah, blah. I only went the GCOS route because I had read that the 3.0U Wii firmware made it impossible to read the config disc and the update disc so I would have to use the GCOS and a multidisc creator tool. This turned out to be false. Simply create the 1.9b update iso (using filechop, command prompt, etc.), and burn the iso straight to a disc, DO NOT USE GCOS. I popped in the disc and it updated to 1.9b with zero problems. I then created a disc with the 1.9g (galaxy fix) the same way, again no problem. So people having this problem, try this method, it worked for me.