Mac Mini G4 IDE jumper question

[jsm]

Hello. I'm new to this board, and pleased to find people who still care for PPC Macs.
I have been trying to resurrect my G4 Mac Mini, which had a HDD failure, and I've run into an interesting error.
With the new HDD installed, the Mac will refuse to boot from either HDD or CD.
If I put a CD in the drive, it refuses to boot from that either.

However, if I put a CD in the drive, and restart with the mouse button held down, it will boot from the HDD.

There's obviously a problem with drive selection at boot, and I suspect that I need to put a jumper of some kind on the replacement HDD. From memory, I think the Mac is expecting the HDD to be in cable select mode, but I can't find any confirmation of this, and some guidance would be appreciated.

[FBz]

Which G4 Mac Mini?
What type of HD? Just like your old one?
If so, how were the jumpers set (or not present) on the old one?
Trying a new SSD? What OS? The new Mac Mini OS 9.2.2?

You might need to be just a bit more specific. Thanks.