Originally Posted by
Harrison
Version 40.63 is the correct version of 3.1 for use with an A600, so either you don't have the chip installed the correct way or it isn't working.
If it is an Eprom it will have what looks like a small clear window in the centre which can be used to erase the chip with UV light. It is actually illegal to sell eproms with a copy of kickstart on them so the seller was breaking the law selling you that chip. I hope you didn't pay much?
Sometimes the Eprom used is slower than a real Kickstart rom chip and the Amiga doesn't wait long enough for the rom to access it and so won't work.