Laptop power connections are notoriously fragile. The computer's internal jack is often only loosely connected to the machine and can become dislodged easily. But before taking your Compaq laptop in for professional repair, take a few diagnostic steps to ensure the problem isn't something much simpler like a blown circuit or faulty cable.
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Try to plug the cord into another outlet. Even if you are using an outlet that has worked before, it is possible the electrical circuit to that outlet has blown. For this reason, choose an outlet as far away from the first as possible, preferably in another room, to ensure the two are not on the same circuit.
Take the battery out of your Compaq laptop. The method for doing this varies by machine, but usually involves a button, screw or lever on the underside.
Plug the laptop in and try to turn it on. Oftentimes what appears to be a power connection issue is actually a battery problem, which removing the battery will fix. If this is the case, you can use the laptop with the battery removed until you get a replacement from Compaq.
Try to turn on the computer several times if the first does not work. Each time, hold the power jack at a different angle. If the internal jack has been jostled, it may be that from a certain entry angle the connection will be made. This will still require professional repair, but will allow you to more clearly explain the problem.
Borrow or buy another laptop adaptor cord. If the above steps don't work, either your cord or your computer is having serious problems. If it is the cord, a simple replacement will do the trick.
Take your computer into a professional repair shop if all the above steps fail. Because the power jack is generally located close to the motherboard, any further action on your part runs the risk of causing much more serious damage.
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