I just soft-modded my 4.2E Wii and now bootmii doesnt work, and the TV doesn't receive the Wii when I turn the wii on with the SD card in.
So it worked before? IOS or boot2 install?
So the Wii boots with the SD card left out?
Check the bootmii.ini file and verify that it attempts to set a video mode that is appropriate for your TV.
Try another SD card.
Not really doing much Wii stuff these days.