However when I boot it - it just sits there at a blank workbench screen. There's a message before that in a full window, but it flashes by so quickly I can't read it.
Ok, when this happens again, press F12 to open the GUI, go to the CPU page and select "match A500 speed". Then click on Reset. When the Amiga screen goes black, hold down both mouse buttons and keep them pressed until the early startup menu appears. Now click on "Boot without startup-sequence". Press F12 again, go to the CPU page and change the speed setting back to "Fastest possible". Click on Ok. In the AmigaDOS window enter
ed s:startup-sequence
In the editor window scroll down to the last two lines. These are LoadWB and EndCLI. Insert the following line, so that the last three lines read:
LoadWB
ask "press enter to continue"
EndCLI
Press Esc and enter X to save the changes. Press Ctrl-Windows-Windows to reset the Amiga. From now on before the flashing AmigaDOS window disappears, it asks you to press enter and you have enough time to read the error messages.
Bye,
Thomas