On Nov 8, 3:02*pm, pat wrote:
My 302 won't go. When you turn it on it just starts up with "CAI 300"
on the LCD and thats as far as it goes. It did this a couple of times
last year but seemed to sort itself out after a while. This time its
well and truely stuck.
Any ideas?

Try to switch Serial - USB switch a couple of times. Switch to USB
boot it and then shut it down and switch back to Serial and boot it
again.