No bleed air to engine

[mraviator]

No issues starting the engines dozens of times since buying the aircraft. Today, with APU running, neither 10th nor 14th stage buttons ever lit up, and I don't know why. I even tried with an air compressor and verifies good air supply from that or APU, but it's as if teh valves would not open.

One-off glitch fixed with new airframe or something else?

[ois650]

Make sure 14th stage pushbuttons are out, as well as the L & R pushbuttons on the 10th stage. All you need selected is APU LCV and ISOL. 

14th stage should not illuminate with only APU running, please see diagram for reference.