I had this problem with a beefier Dell a while back on another airline, so it's not CO specific.

Ultimately I found that the power cut-off varied a decent amount between seats, so I ended up plugging into a different socket which worked better, cutting out only occasionally and resetting relatively quickly.

I would give them the benefit of the doubt and assume that 80W+ laptops were not something they anticated when they installed the power systems way back when...