I'll suggest starting with a reset, with battery out and laptop unplugged, press and hold the power button for ~30 seconds, put battery back in, plug in power adapter, see where you get.
If there was a power event (brown-out, surge...) a polyfuse may have "blown" (polyfuses are nice because they reset themselves) and in that case simply waiting and trying again "fixes" things (wait time can vary but shouldn't be more than a few hours) I just replace my laptop with new motherboard 2 weeks ago.,and it seem the problem is happening again.
There are also services that specialize in that repair This is EXACTLY what happened to my ASUS X43S.
No indicators or lights on the laptop while the power adaptor has the green light on.
Usually, there will be an indicator light when the speakers are turned on.
The chances are that you have access to another device that will drive sound to your speakers or headphones.
They didn’t always have that, so it was nice when that came along.
Try the new device with a pair of speakers or headphones that you know work. Good, now try the speakers that aren’t working on that device.
If they don’t work, then yes, chances are the problem is your speakers or headphones. Unless you are really handy with a soldering iron and want to give repairing them a try, I don’t see how it would be worth it to try to fix them. In many cases, you may be dealing with a device that’s a few years old.
You may not notice how important it is until the sounds disappear suddenly. It might have got turned way down accidentally while dusting or shooting Nerf guns. If it’s the device’s own speakers that appear not to be working, then external speakers can still be a problem.
Then, there’s a sudden recognition that something is not quite right, or if you’re playing a game, that something is terribly wrong. Most devices will shut off their internal speakers when an external speaker is plugged in.