Hello I have a toshiba satellite laptop and the external speakers do not work no matter which speakers I attach none of them will have sound however all of the external speakers work when I plug them into other machines. My interal speakers are functioning fine. What could be causing this issue maybe a window update or something else. I am not too familiar with audo settings and how they effect the speaker output.
After you plug them in you may have to change the default output device. This can be done in Control Panel under the "Audio Devices" section.
You will see a list of installed devices which allows you to change the default output device:
Some applications also need to be closed and reopened when a new sound device is selected. I know this is the case when using flash in web browsers on my machine.