MBP will not power on or respond to pressing the power button.

I need some support advice for my 2011 Macbook Pro. I used it early Saturday morning. I left for the day leaving it on hibernate and unplugged. Bad habit I know, but I've done it a million times. When I arrived home the computer was completely off. The battery indicator says there is a charge. However, when I press the power button there is no response. No chiming....no clicking. I purchased a new hard drive a few months back. So I swapped the hard drive back to the original hard drive. No response. I tried resetting the SMC with no response. There's been no water damage to the machine. I'm using the original power cord so I know that's good. When I plug it in it's still charging the battery according to the indicator lights. (The battery wasn't full.) Does anyone have any suggestions?