I have a Sony Vaio F Series that was having issues charging because the DC Jack was loose, making me hold the cord just right to charge it. Eventually it stopped charging at all, so I replaced the DC Jack but when I plugged it back up there was no power and the oem power adapter was beeping. I had hoped that the old DC Jack had just messed up the adapter, so I got an igo universal adapter but when I plugged it in the light turned off and it didn't charge the laptop either (the adapter does work in other laptops). I was wondering if anyone new what was likely causing this to happen.