Power adapter port frying power adapter?

sequences of events:
1) travel with madsonline power adapter, months ago when plugged in, cord is yanked, bent the met ring around the male part of the adapter, pried it back to a sort of circular shape, fits back in adapter port and with proper placement charges machine
2) after months of using original apple adapter at home, always detected and charges, and the madsonline on the road, with some proper setting into the adapter port will charge, when on the road the machine stopped detecting the power adapter
3) bought new apple brand power adapter, plugged into port, circle is green but machine did not detect the adapter, no charge
4) went to local apple sales and repair place (not an apple store) and while there, using another adapter, machine detects and charges (the tech at store heard some sort of short or electrical event when connecting), then I used my new adapter and worked, recall slight short/shock noise, the old madsonline did not show anything.
5) came home, new adapter plugged in, ring goes orange, goes to full charge, remove the adapter and there is a noise like a short, pluge it back in and the adapter ring has no light, machince does not detect adapter.
Q1) Could it be that the damange to the adapter port killed the madsonline and now killed my new apple adapter?
Q2) Since it appeared an adapter we used at the store also made that electrical noise, may replace the 3 day old apple adapter with a new one but if it just shorts another one I guess it is the DC-in adapter port. Anyone guess that this behavior means a replacement for the adapter port?
Sorry for the long story, looking for some feedback or confirmation if anyone has had this type of behavior.
thanks
Craig

update to story, day 2
1) went to store where bought the adapter, they tried it on a display model and it worked fine so assumed my port on my machine was bad
2) get home, power down the machine, plug in the adapter and it works, and is working, charging. I still heard some type of pop when connecting it to the machine so something must not be totally correct.
3) saw the DT&T service as an option, was going to ship it but will determine if there is a way for me to connect and unconnect the power without losing the ability to charge (i.e. always when powered down?)
I have reset the PMU.
Any suggestions for attaining more reliable power connection or if anyone has this behavior?
thanks
Craig
iBook   Mac OS X (10.4.3)  

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