I have a Picasso IV in my 4000T. If I boot from the Install WB 3.1 floppy video from the Picasso IV is fine, When I boot from the Workbench 3.1 floppy my monitor displays out of range and no video. So for testing I have my 1084 monitor connected to the standard 23 pin video connector and video is displayed perfectly. So why can the install disk work and not workbench? I have tried all the different jumper settings on the Picasso IV and no change.
I wouldn't expect the Picasso to be outputting anything at all from a standard install or workbench floppy disk.
If it's just the AGA going through the flicker fixer on the Picasso then I imagine your workbench disk has a different monitor or mode selected than the install disk.
