thanks to both. Yes I agree with Ground power starts and cross bleeds to start 1 off the other - aware of that. I just tried what I could at the time. Maybe coincidence rather than a strategy. I re-installed the CRJ yesterday and got normal starts from the APU so perhaps a glitch somewhere....all OK now at least.
I am using P3D V4.5 HF3, the only download available for Anchorage is for P3D V5 which is causing issues when trying to open the config file. When attempting to open the config file it says it requires a P3D V5 installation which I do not have.
The other issue is that there is no dynamic lighting whatsoever at the airport.