E One of my old MacBook Pro has issue of battery not charging at all, and I did the followings:
# Pram and smt reset, no luck.
# Unplug battery indicator cable from logic board, no luck.
# Laptop became extremely slow if battery cable is connected with logic board, unplug it, it performs faster (but still slower than normal)
# Purchased a used battery over eBay and installed it, same issue as above.
So, what could be the issue here, logic board is bad or need to try another battery instead?
Any thoughts?