My MBP, 15" 2010 model won't charge or turn on. I've done as much as I could to fix it: tried different adapters and resetting the SMC etc. When I press the power button, absolutely nothing happens. When the charger is connected, the light is a very dim green, not like the brightness when completely charged. This has happened before but I could use another charger but now none are working. Tbh, I was expecting the release of a new mbp last year (it has been so freaking long) and may have been treating it without total care. Is this a battery problem? Or some other hardware problem?