2011 MBP 13" Won't Power Up



My sister's 13" MBP (2011) died a few hours ago. According to what she told me, she was using it, and then, poof, black screen and no power. She doesn't have the cash at the moment to have it properly checked by a tech, so I did a basic troubleshoot in an attempt to narrow things down.

While the internals are a bit dirty, I didn't see any obvious signs of physical damage (it was relevant to check for this). Furthermore, the machine doesn't seem to respond to any power sources. I tried a couple different power cables and, while the little amber light on the magsafe (sp?) tab will come on briefly, the computer with neither power on nor display a charge on the built-in charge indicator. I will also note that the machine failed while disconnected from an outlet source with a full battery indicated.

My initial conclusions are a) the computer fried itself or b) the battery is toast. Any suggestions?