I have a 2012 non-retina MBPro. It is able to charge the battery but will not turn on. I tried all of the typical troubleshooting such as resetting the NVRAM and the SMC. Neither worked. So next, I pulled the battery and tried to power on the device via the power cable. No dice. Disconnected the keyboard and tried to jump via the power pads. Nothing there either. Tried different ram sticks, same thing. So before I throw in the towel, is there anything else I should be trying or is the logicboard on this thing dead?