Crashing mac. power cord?

I've heard of laptops and macs etc. battery dying and will not power without power cord in, however my mac seems to keep crashing if power cord is in and gets knocked or taken out, however left for about 30seconds off will power up again without power cord in... but power cord will then not work until i've unplugged from the wall, fiddled around with it for a bit... after about 5 mins the power cord will work again.
This happens every time the cord is knocked or taken out. Also, after crashing the macbook will then ask me to confirm "incoming connections" .. after googling what ones they were they were things from my microsoft office package and mail and nothing suspicious. Clock will also go to 00:00 1/1/ etc, but if i click on the date& time preferenes it sorts itself out and goes back to normal date and time.
Itunes also restarts and needs me to confirm... not sure about other programmes yet.. but no files or data has been lost.
Just everything resets?
Wondering if anyone else has heard of this? If anyone might know if it's the power cord tripping out and somehow glitching the macbook?
I don't have any issues with my battery draining abnormally, and once the power cord is up and running and plugged in, it's charging fine. Just a bit confused. I've never heard or experienced anything like this before!
I live with my laptop for my uni stuff so any info would be great!
Thanks, Georgie
Ps. I have a express lane phone appointment booked for friday, but just wondered if anyone had any information in the mean time.

Hi...it sounds like I've been having similar problems as well. This has happened when I tried resetting the SMC twice and the PRAM.. it has done it twice since then after fiddling around with the adapter. It's like it goes to sleep by itself right and then you awake it and then it shuts down? When I restart it I'm having to press the power button lots of times to get it to start and then it tells me to accept stuff and reset the clock. Same symptoms you are having? If you find out what the problem is, and if I'm able to fix this too myself...I'd like it if you post back here! I'm also having problems with the battery showing "Not Charging" on the indicator and having the adapter light a steady green, which I am going to have to get it looked into as well. Thanks!!!

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