Keyboard and AC adapter problem

I have a Toshiba protégé z935-p300 and I just recently experienced this problem where whenever I plug in the ac adapter the letter "K" starts typing rapidly on the monitor. The button is not stuck or dirty. Whenever the adapter is unplugged everything works perfect. Please help me fix or find a resolution for this problem.

I have never heard of this before. I Googled and came up with nothing even close to your problem. It's the week end and you may recieve more replies latter. I would try a different adapter???
Dokie!
PS The only thing that comes to mind is a improper ground????
I Love my Satellite L775D-S7222 Laptop. Some days you're the windshield, Some days you're the bug. The Computer world is crazy. If you have answers to computer problems, pass them forward.

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