Hi, I'm hoping some here can help me with my laptop power adapter. It's supposed to be putting out 19v to power my lappy, but the other day it just wouldn't work. So I checked it with my volt meter an it gave me a rating of 12v So is there something that could have burnt out that would make it drop that 7v? I really hope someone can help me, I dont really feel like shelling out $100 to replace it. Thanks