The act of removing the Laptop/tablet battery and AC power adapter, pressing the power button, is the standard power "reset" of these devices. This power reset fixes many issues. I use a similar power reset on external monitors to fix many issues =* Turn the PC off* Turn the external monitor off* Disconnect every cable (including the power cable) from the external monitor* Press the external monitor power button in for 8 seconds (clears any residual power in the circuits). If not a mechanical power button, just wait 8 seconds* Reconnect the power cable and one video cable to the external monitor and PC* Turn the external monitor on, then the PC
Speakers and/or headphones not working even though they are plugged in and/or connected? Hi all, It seems to me that it doesn't matter what laptop you have, this problem seems to be across the board and most are assuming it's a Windows 10 problem. While I don't know about that and even though I have Alienware, this solution below always works for me as not having the speakers working is so annoying at the best of times. So if you have tried all the other advice that everyone else has given you and it's still not working, try this as a last ditch effort before you turn to computer repair specialists. 1.  Perform a forced shutdown. On my computer this would be the Alien head on the top of your keyboard. Do not shutdown using the start menu as this won't solve the problem. This is where you press and hold the power button till the computer shuts down. Make sure you close any tabs and save any work before you do this otherwise anything you have been working on will be lost. 2. If you have the power cable attached at the back of your computer, disconnect it. 3. Remove the battery from the back of your computer. 4. Press and hold the power button for approximately 30 seconds. This is to make sure the laptop has completely drained itself of electricity. If you have not been using the power cable to use your laptop, completely drain the laptop of stored power before completing Step 3. Then continue following the steps. 5. Put the battery back in your computer 6. Plug in your power cable. If you have followed the steps precisely up to this point, you won't be able to restart your computer without using the power cable. 7. Press your power key as you would normally when starting your computer. By this point, the computer will start as it usually would and the speakers and headphone jack will be working as normal. If you are still having problems with your computer, then definitely take it in to a specialist who will be able to help you. As I said earlier in my thread, I have an Alienware and I have used this method when my computer starts to play up. I have also used this method for my iPad, my partner's MacBook, and my daughter's Lenovo. I don't know if the problem is caused by a glitch in Windows 10 and I am not expert, computer specialist or a computer geek. All I know is that this method works for me when all other solutions fail. Good luck                                                                   
No speakers or headpones, but are plugged in, fix!