VNAV won't engage

[yan.lamothe 0]

I had this problem too and the reason is I didn't set the reserve fuel, look for it as well

[jbcallender 53]

Check your target altitude on the CLB page

[Wendall 50]

It amazes me how you guys find these old threads...thank you jbcallender

[jbcallender 53]

I'm a newbie to PMDG, so I'm learning all of these little tricks that you guys discovered a couple of years ago....love the NGX by the way.

[spectre0618 0]

Press the "clb" button on the FMC, fill the info and if already filled, "exec" light should be lit. Press it and then VNAV should arm

[TopgunB 3]

So I am reading this years later and I had the same problem--turns out there were no V speeds shown either and although I had entered everything correctly into the FMC I had not pushed Exec button. As soon as I did that V speeds were shown and VNAV would arm! Bryan

[AlecA 0]

Moved my flight controls around and the issue was resolved. I had my headphones on my yoke.