It means your eyes are on but not detecting any paint, I'm guessing your at home with the marker and don't have any paint in breech. If it happens that you are shooting it and It is coming up then give the eyes a clean and see is it happens. If you are just playin around press and hold the top button an turn the eyes off.
( ) = eyes on , no faults
(0) = eyes on, something in breach
] = eyes off, due to fault
[ ] = eyes on recovered from fault
[0] = eyes on recovered from fault and ball in breach
That's right love, as soon as i pull trigger goes back to this ] tried it at mayhem today still no good i will send it in for a good service this week.