Only sound on one side for both phone speakers and headphones. What's wrong?

[FelleBanan_ygsr]

I have a Huawei P9 Lite Mini and just today I noticed something strange. When watching a video with my headphones on I only heard the left speaker. I tried different videos and checked the headphones, but it all seemed fine.
Then I tested with the phone speakers and there was only sound on one side.
Is there anything wrong with my sound chip or something?
Is there any way to fix this?

 

[Rukbat]

There could be something wrong with the sound somewhere on the motherboard, or a connector could have come loose (or a wire might have broken). It's inside the phone, whatever it is, and unless you've already repaired a few phones internally under supervision, I strongly recommend that you don'ttry to fix it yourself. It should still be under warranty, so let Huawei worry about it. (Back up everything before giving or shipping it to them - if they're good, the first thing they'll do is a factory reset. See Backing up an Android Device.)