My Vostro 3500 will only power up on battery but not on AC. Once it's powered up and I plug in the power supply, the power supply is apparently working because it's charging the battery. Also, when the laptop goes into sleep mode and I attempt to restart it, instead of presenting the login screen, it acts as if the machine has not powered down gracefully and displays the screen asking if I want to start up in safe mode.
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Dell Vostro 3500 powers up on battery but not on AC
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