Why does my 960 Volvo not start at times after making a short tripnothig happens when you turn the switch but let it set for an hour and she will crank this happens about once every six weeks?

probably a bad starter have it checked.

This somewhat reminds me of my situation. I have a 960 and often when i start the vehicle the interiors to go on but the gears won't move, the seatbelt light doesn't flash, etc. If i tilt the key in the ignition back, ever so slightly, it will catch and the car's ready to drive.

Alternatively, I would say it's a bad starter as I've experienced one of those in a 2001 Taurus and after too many of times of it 'just catching' it completely failed.