Macbook Pro...will work for a few minutes, then power goes out all together

Hey guys, tried finding an answer to this somewhere else on the forum, but came up empty. If this has been answered elsewhere, feel free to direct me there.
I have an older macbook pro (2011) that's in rough shape, but worked well up until recently. The symptoms I'm experiencing:
-The computer will charge (all lights are showing green on the charger and the computer)
-When I try to turn it on, sometimes it will turn on fine. Other times it will light up, then shut down immediatly
-If I remove the power cord and insert it again, sometimes it will boot up
-When I can get it to boot up. It will run fine for about 1-2 minutes, open all the programs, then shut down/black out all together (as if the battery was removed)
I'm assuming this is a hardware issue, or a cord issue, but not sure where I should be targeting my efforts. Any ideas? Thanks !

Hello FrancisN,
Thanks for using Apple Support Communities.
For more information on this, take a look at:
Wi-Fi: How to troubleshoot Wi-Fi connectivity
http://support.apple.com/kb/HT4628?viewlocale=en_US
and
Wi-Fi and Bluetooth: Potential sources of wireless interference
http://support.apple.com/kb/HT1365
Intermittent or complete loss of the wireless connection
Best of luck,
Mario

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