find the manual for the lucky board, and check what your dwell is.
if it is set too low, it may still fire one shot (from the ABS (anti-bolt stick) feature being ON). then not fire again.
if your tank is low on air, the bolt wont seal and cause it to leak. not saying that is what is happening, but could be...
as far as repairing it.. i can recommend one person, who ive dealt with before... grss429 is in NC and works on dye/proto guns all the time.
costs about $35 to get it fixed, but worth it.
you can message him here.