Not charging, blinking green/orange light

"Try an SMC reset. If that changes nothing then you have a hardware issue could be the charger, the DC-in port or the battery is bad.

Replacing the charger would be the easiest cheapest place to begin.

If this answer is acceptable please remember to return and mark it accepted."

disconnect the battery charge indicator from the motherboard. It is near the battery connector. This should solve your problem

In my case, my battery is bad! I changed and everything works fine now

"I had the blinking light yesterday.

I opened may MB 2011 17” and it was hot as !&&*. I took off the battery and waited. 12 hours later it was working as usual."