For some days I only hear music on the left side of my headphones
Probably a loose connection. It will not be that easy.
I've already wobbled but nothing happens. The laptop is already 3 years old
I think it's more of the speakers than the laptop
How do you mean
can only be dust in it or
Theoretically yes, but then you would rather hear the music + a rush. That's unlikely. How old is / are the speakers?
I have no idea I bought the laptop 3 years ago, have no idea of technology
It may also be that the socket is already defect. Does this happen with other headphones? If not? Then your cable is defective from headphones.
With another headphone I hear only on the left something
Have you ever looked under Sound setting whether everything is 100% loud at balance?
All stands for 100%
My Windows 10 tablet is also 3 years old, and is still not cleaned and for me the headphone jack is still working properly. May be that there's something damaged.
You can try the laptop case to make and see if there's no dirt in the socket sets. Otherwise you have to buy a USB sound card.
