My nt11 us all gases up and when I try to shoot it it flashed green, this says in the manual it's the eyes but it's not as when I turn the eyes off it won't work and the bolt in the back doesn't come out far enough and you can push it completely in I have taken it apart and all looks fine
check your dwell setting. Ideally you want it around 11/12. On top of this check all the inner bolt o-rings, change and lube them and replace the spool bumpers & spring. I'd recommend changing the spring and bumpers as they tend to wear down a fair bit. As Craig said check your reg pressure as well. All else fails you are welcome to send it in to us to have a look at. However please email me on eurotech@dyeprecision.com before sending anything in as I'll need to issue you an RA number and take some more details off you.