I've got an ASUS ROG G750JW & recently put in a new ASUS battery. It's an exact fit but the past week, I've been enjoying the infamous green & orange flashing light.
I've done the usual, such as holding down the Power Button on reboot (which fixes it for a few hours) then removed the battery and held the Power Button down for near two minutes.
A couple days ago, I plugged the charger into the wall outlet instead of the Power Bar and thought for a bit that it was fixed but that's gone by the wayside.
Any new suggestions on an old problem that seems to have plagued many over the years?