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Inspiron 15R 7520 beeps on start up

Hello, my laptop just started making a single repeated beep noise on startup. I can shut it down by holding the power button and then it usually will startup normally however I am in the middle of an online school project and very concerned the motherboard might have issues.  The laptop is 15 months old and no abuse.  I have tried powering off, removing battery, unplugging all peripherals and holding power button for 15 seconds.  I have also tried reseating the memory and that has not worked.  Would anyone have any other ideas of things I could try?  I did install a VMware VM with Ubuntu OS and having been running this for about two weeks now without issue.  Not sure if that would matter much since the resources are really not maxed out too much.   

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