I guess you have a tower (?). Do you also have a Zorro 4 bus? If so I've found a 'design fault' which gives the red screen, etc.
Also the Power Flyer attachment in the original ROM sockets is very dubious IMO. The kit includes a pair of plastic ties to ensure the PF stays put, but how the Heck you're supposed to do this is unclear. Check that the PF if completely into the sockets. The card should be in contact with the sockets face.
Cheers,
JaXanim
