power button - you use the ........ to switch the computer on., volumen control - you use the ....... to turn the sound up or down., loose Conection - I think there's a ...... in the switch. Sometimes it works and sometimes ir dosen't, control panel - Go to the ....... and click on the sound icon, the click on internal speaker, mute box - If you select the ....., you won't be able to hear anything, replace - The graphics card is broken. you'll have to ...... .,

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