I have a lenovo n22 laptop. I am posting this message on it. I was watchingi a   
   youtube video when I realized that the ac/dc adapter was unplugged, when I   
   plugged it back in, my laptop made a errrrrrrrr noise and then froze, I turned   
   it back off and    
   turned it back on, 40% of the battery had been drained. But now, I can't   
   charge it, this is the only charger I have. When I plug my power cord in, the   
   screen will flash black for about 1/5 of a second. I checked the power cable   
   and it was still giving me    
   current. I don't know if the adapter has been fried and it is trying to put ac   
   power into my laptop or it has just fried the power component in my pc. I need   
   a way to see if the adapter has been fried or not I need a way to test for   
   alternating current    
   without a meter. I have 18% left and I am currently backing up everything.   
   Urgency is needed. I have no other way at my house to a computer.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)