Not able to receive sound from my laptop unless wearing earphones
Solution 1:
This happened to me once. After a lot of effort, I realized that the audio jack in my computer was damaged. This made the audio drive believe that I always had my headset connected, so I could only hear the audio when using them.
I was able to solve this by disabling the audio jack from the configuration panel for the driver.
Hope this helps someone.
Solution 2:
Hopefully you have a HP/IDT program, I'd check the settings there. If you don't have this program I'd suggest you download the audio driver or audio SW from HP. If you have the laptop model I can help you find the driver. These SW programs usually have a pop-up prompt when you plug in a headphones/external-speaker so have a lot of various settings I am thinking could help your situation
--edit, EliteBook 8570p audio driver: https://support.hp.com/us-en/drivers/selfservice/swdetails/hp-elitebook-8570p-notebook-pc/5212912/swItemId/ob-115135-2