Laptop wont charge anymore? Still works on battery?
If you have a loose connection where you plug in the power on your laptop, or it works intermittently, you could have a bad dc jack.
Symptoms
- Move the power plug and the laptop loses connection
- Broken or cracked dc jack
- Laptop wont charge but worked on battery
- Power LED and battery LED flicker when the adapter tip is moved
- Battery wont charge
- Sparks come out the back of the laptop
Why does this happen?
- Flaw in manufacturer designs
- Use of universal or non-original ac adapter
- Lots of plugging and unplugging of the ac adapter
- Tripping on or pulling the ac adapter cord
The wrong information some repair centers give:
Most service centers dont want to deal with this problem on a micro repair basis. Many, including the large nationwide stores and the laptops manufacturer, will either tell you the machine is not repairable or that it needs a new motherboard. These quotes usually run from $250 to as much as $800. They choose to ignore the fact that a broken power jack can be repaired without a motherboard replacement.
Common brands with this problem are HP/Compaq, Toshiba, Dell, and Gateway. Don’t pay hundreds to fix something that can be done for under $200. Many repair places only replace the motherboard and that can cost anywhere from $300-$1000. | 
