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check the settings in windows.<br />
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i have a dell studio, if you are using IDT HD Sound, it opens when you use both microphone and headphones,<br />
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check the settings in the IDT manager
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Do the speakers work when the headphones are unplugged?<br />
Also, when you click on the sound icon in the system tray on the bottom right corner of the screen, open the mixer and check if the volume is lowered for the speakers.
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Built in Speakers do not work, regardless of any combinations. &nbsp;<br />
Headphones work when they are plugged into the laptop.
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The speakers that are built on the laptop do not work, but headphones work. &nbsp;I have updated the BIOS to latest version.
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The speakers that are built on the laptop do not work, but headphones work.  I have updated the BIOS to latest version.

check the settings in windows.

i have a dell studio, if you are using IDT HD Sound, it opens when you use both microphone and headphones,

check the settings in the IDT manager

Do the speakers work when the headphones are unplugged?
Also, when you click on the sound icon in the system tray on the bottom right corner of the screen, open the mixer and check if the volume is lowered for the speakers.

Built in Speakers do not work, regardless of any combinations.  
Headphones work when they are plugged into the laptop.

Dell Laptop XPS M1530, Speakers on the laptop not working

A laptop or notebook is a portable personal computer with a clamshell form factor, suitable for mobile use. Although originally there was a distinction between laptops and notebooks, the former being bigger and heavier than the latter, there is often no longer any difference. Laptops are commonly used in a variety of settings, such as at work, in education, and for personal multimedia. A laptop combines the components, inputs, outputs and capabilities of a desktop computer, including the display screen, speakers, a keyboard, and pointing devices (such as a touchpad or trackpad) into a single unit. The device can be powered either from a rechargeable battery or by mains electricity from an AC adapter.