Pilots using the Power Up checklist might run into issues with AIR COND PWR

[Rongor]

This is valid for the "sim -  no tests" realism setting.

Checklist wants the crew to power up the AIR COND (2nd image). This will fail because the Pressurization switch to Auto item is missing in the preceding Pressurization panel section (1st image). Hence the switch will still be in AUX VENT setting (which is the current default for cold ramp start spawns), which will deny setting AIR COND to ON.
Only on the following Before starting engines checklist this gets remedied, as both systems get addressed again, this time with the correct Pressurization mode switch setting mentioned.