Windows 10: Internal speakers not connected

My internal speakers aren't working. I cannot come off of mute. I have tried re-enabling devices, but it only shows me external devices and no internal sound system or in-built speakers. My computer was recently fixed by HP and the speakers were really crackly, now they don't work at all. The laptop hasn't incurred any damage sinceI am trying to include a screenshot but the message box won't let me copy anything in

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How to disable the internal speakers when connecting external speakers?

The instructions for connecting headphones/external speakers inplies that the internal speakers in my HP Envy 23-d260qd computer will be disabled when the headphones/external speakers are connected. This is not the case - both the speakers and the
headphones work together, thus defeating the purpose of headphones. There seems to be some suggestion that this problem has been caused by an update to Windows10. I have been connecting of headphones or external speakers and would mechanically disabled the
internal speakers as happens with molst audio equipment. Any advice will be much appreciated.

 

no sound plays through internal speakers

I cannot get any sound to play through the internal speakers of my laptop. It did play previously. The speaker in the task bar has a red and white x and the trouble shooter says no speakers headphones plugged in. When I pull up the info on sound it lists
its location at HDMI port. Suggestions?

 

Switching off internal computer speakers

This is a subject that has been raised before but Microsoft seems to refuse to answer. As a result of a previous update to Windows 10, the internal computer speakers work as well as the external sound system. There is no apparent way to switch off the
internal speakers and just have the external sound system working. A previous contributor suggested that Microsoft had a solution to this bug but wouldn't elaborate. This seemed very childish.

I ask the question again: Could someone give a step by step process for switching off internal computer speakers AND leaving the external speakers working. I have tried every setting but nothing fixes the problem. Surely this isn't rocket science and
it would be easy for Microsoft to write a bug fix???

Lack of action just infuriates users unnecessarily.