My Sony Vaio PCG-8C4L Will Not Power On
If you are unable to power on a Sony Vaio PCG-8C4L you are likely experiencing a problem with either the power supply or the battery. If the computer doesn't recognize either of these components, the power switch should be replaced.
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Check the Battery
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Check that the laptop's battery is correctly docked inside the device and is free of dust and dirt. If the battery has run out of power you will need to plug the power adapter into the laptop to charge it. If the battery indicator light blinks, the laptop recognizes the battery. If the battery indicator light does not blink, the laptop is not recognizing the battery. Proceed to Section 2.
Check the Power Adapter
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Check that the laptop is correctly connected to the power adapter supplied with the unit. If your laptop recognized the battery, leave the battery in and plug in the power adapter. If the power indicator light does not turn on, the power adapter needs to be replaced. If the laptop did not recognize the battery, remove the battery and plug in the power adapter. If the laptop does not recognize the power adapter, proceed to Section 3.
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Other Issues
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Failed internal components such as the hard drive and CPU will not prevent the laptop from powering on. If the laptop doesn't power on after replacing the power adapter, the only other possibility is a faulty power switch. Replacement switches can be found at some second-hand equipment retailers or you can contact the manufacturer about purchasing a replacement switch.
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