A1200 wont boot without hard drive
About a year ago I bought an A1200 with a 400mb hard drive. Recently, the hard drive has become corrupt so I've ordered a new one but in the meantime decided to take out the old one. I took out the bracket, the hard drive and uplugged the I/O cable but now when I switch on the A1200 it doesn't boot from floppy. I was expecting the usual "Insert disk" animation that you usually get but instead I get nothing but a white screen whether I have a disk in the drive when I switch the Amiga on or not.
Am I missing something? Do some jumpers need changing on the motherboard or something?