I have a dell 5100 that turns on when it want to. Most of the time it does not turn on. When your try to power it on you can hear the fan turn on for about 2-3 seconds and then it stops and don't power on. Any suggestions?? Please help!!!
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This is generally a problem with the battery or a memory chip. Start by removing the battery and starting up on the power supply only. Dell batteries are notorious for causeing a no start. Then try removing the memory and try one chip at a time in both slots. If neither of these work, then I'm afraid you have a failed system board component, ans you will probably want to take it in for a professional diagnostics. Also, you can find a diagnostics light codes list for your machine at Dell's support site.
if you can hear the one beep sound when booting that means your laptop's system is in good condition. try putting it in the external monitor if still you cant see anything both in external and the LCD just install the old keyboard and press the Fn then external monitor... hope this helps...