It sounds like your downgrade FAILED. This could be caused from a variety of reasons. Perhaps you neglected to install the appropriate system ios for the system menu you installed, or perhaps you downgraded to a system menu with a system ios that does not support your hardware. Regardless the only fix for this is a boot2 bootmii installation, or a nand programmer requiring a nand dump with key.bin if your wii does not support boot2 bootmii installs. Preloader would be removed with the system menu install, so it can not help you. Savemiifrii and savemii also will not help as they require a functional recovery, which you likely do not have. So a mod chip will not help you.
No need to apologize to me, I love these questions, but I prefer the ones with a fixable solution. Sorry I can not help you further. I think you need a new wii or send it to Nintendo.