Get the trouble code with an OBD tool and then take it from there. If all else fails you can find an upgraded fast charger from a donor car and put it on your leaf. A real win win. Also check the fuse. There is a fuse in the charge port under the rubber covering behind the plastic socket! Also check to make sure the ground wire is securely connected to the back of the device and the charge port isn't damaged. One of the symptoms before I had to replace my charge port after it melted is that one time it started to charge briefly then stopped.
If you have the timer set for a time 12 hours from now and you plug in a level 2 charger do the lights blink one by one from left to right for a while. It definitely sounds like a fault in the high voltage system.
The part new is 1800 for 3.3 2000 for 6.6 or 3800 for 6.6 + quick charge. https://www.nissanpartsoverstock.com/a/ ... 22172.html
but these are new, OEM parts. Would be cheaper at the scrap yard