Acorn Computers Limited A4000 Welcome Manual page 76

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If things go wrong
Flashing floppy drive light
If the floppy drive indicator light flashes more than once when you switch on, and the
computer doesn't power up properly (you can't see the RISC OS desktop after a few
seconds) consult your supplier.
If the light only flashes once, this is normal. It should happen every time you switch on
or reset the computer.
Pointer won't move
If moving the mouse does not move the pointer, check that
You might need to clean the mouse ball. See Cleaning the mouse on page 67.
If all this fails, try holding down Ctrl and pressing RESET (on the lefthand side of the
computer)to start the computer up again.
The pointer is not visible on the RISC OS desktop
If the pointer is not visible at all, check whether the command line (with * prompt) is
at the bottom of the screen:
If it is, press Return to get back to the Desktop.
The computer powers up in Supervisor mode
If the computer powers up in Supervisor mode (the word *SUPERVISOR will appear
at the top of a black screen) type Desktop at the prompt, then press Return. The
section Restoring default values in Appendix C: Resetting and power on in the RISC
OS 3 User and Applications Guide tells you how to make the computer start up with
the desktop on the screen in future.
the mouse is firmly connected to the keyboard and the keyboard to the
computer
the surface you are using the mouse on is firm enough to allow the mouse ball to
move. Move the ball with your fingers to check that the mouse works.

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