Thanks for the quick reply!

I will give that a try today.

The battery was replaced by a "mac professional" who thought the battery was the problem (no video). But, I wasn't around when this was done so I suppose I cannot be 100% sure.

Is there a way to self-check a battery with no spare mac around?

Also, assuming battery is fine and knowing the AV card is new, what would you suspect next? Thanks again!