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Your Compaq laptop's AC adapter provides power to the laptop and charges the battery. If the adapter is having problems or failing, it can produce several symptoms to indicate that it needs to be replaced. Failing to replace a faulty adapter can be a fire hazard or hurt your computer.
Battery Charge
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A faulty Compaq laptop adapter may fail to charge your laptop battery or it could reduce the effective battery life of your laptop battery. When a laptop adapter is failing or has problems, it can create power surges that make the battery charge unevenly. If your battery is not charging at all, this is usually a problem with the adapter instead of the battery.
Random Shutdowns
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Another sign that the Compaq's power adapter is failing includes random power surges. Surges and power spikes may sometimes be hard to detect, but if your computer is not powering up properly or randomly shuts down it may be caused by the power adapter. This symptom may be hard to diagnose, as many other computer problems can also cause shutdowns. Run your Compaq laptop on battery to see if the computer still randomly shuts down. If it runs fine on the battery, the problem lies with the adapter.
Physical Problems
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If the transformer on the Compaq's laptop adapter has any wear, tear, cracks or other physical defects, it may be unable to work correctly. If the adapter cable is frayed or torn, this can have the same result. A broken power adapter can constitute a fire hazard, as the adapter may cause sparks. You can also be hurt badly if you accidentally touch a bare wire on the adapter. When this type of Compaq adapter problem occurs, you need to have the entire adapter replaced.
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