Hmmm...
Perhaps when you connected the IDE cable to either the Amiga or the CF interface the cable pins weren't lined up correctly? I've done this myself a couple of times before where I had only connected half of the IDE cable up... luckily no damage was caused in my instances.
Also, when you inserted the new rom chips the first time are you sure you had them in the right-most holes in the rom sockets?
Worthwhile checking voltages too if you have a multimeter. There should be 5V, 12V and -12Vdc. On the floppy connector check for 5V and 12V.
Also, check that the floppy cable is connected correctly both ends too...as the floppy light being lit but no noise sounds a lot like a dodgy floppy connection. I've done that before too...
