I have Acer 5520G which is installed with the Windows 7 operating system on it. I recently upgraded my ram in Acer D255 Dual Core. Now when I press the power button, then all LEDs are ON in the laptop, but laptop will not start. Only the screen is blank and has not been any commotion in high definition. I cannot understand if the problem I am facing is due to defective hardware or software? Suggest some solutions, if anyone has had problems with the starter. Thanks in advance.
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