Why is my green light around my power button on my dell computer not working?

deebrs

Distinguished
Feb 15, 2010
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18,510
i have a white button on the front , it's on....but the green light was under my 'power on' square button..i'm thinking it's a bulb blown,...???? but i can still
work online, so don't trouble yourself too much, it's just annoying to me because if i have to step away and my screne goes blank...i wonder now is it on or off...