Yesterday, my laptop, a Dell Studio 1457 was working in fine condition. But today when i switched my laptop back on. It wont finish initial power up, blank screen without Dell logo showing up. The laptop then shut down and then started restarting itself and then eventually shutting down again. Don't know what's going on. Don't know what to do. Please help. My laptop's battery expired so it has been running on direct AC power supply. Please help.
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