NO LIGHT means that the 1st set of nozzles (7) fails to deliver fuel into the burner-can for whatever reason or the igniters are not working. Either cases you close the condition lever to stop fuel flowing (if it's the igniter that has failed) and purge the engine using the remaining "motoring-time".
The starter has its limitations:
60 sec ON/40 sec OFF, 60 sec ON/40 sec OFF, 60 sec ON/30 min OFF
So if after 15 sec you are positive after a NO LIGHT you close the CONDITION LEVER and leave the STARTER ONLY engaged for the remaining 45 sec. Then as above before attempting another start...
Does it help?