Huawei P9 lite sound broken?

My Huawei P9 lite is no media sound again (ie Youtube etc.) but phone calls over earpiece works without problems. Now I wanted to fix the phone myself because I've done that before with the display, but I do not know what spare part I have to buy because there's something weird about it, when I hit the top of the display slightly the sound again as long as I hold it down though the speaker is on the bottom and that's why I've been thinking and wondering if it can be due to the cable connecting the 2 boards. I just wanted to hear the opinion of someone and ask what you would do? Buy a new cable that connects the boards or buy speakersPs: both costs about 5 euro on eBay but would like to save the 5 euro

Update times the software may help the or the phone reset.

I'll try that

Then let's hope it works.

Has not brought anything and now I have to reset everything: /

Well, whoever has to have the newest, he has to expect something like that.

My "Opa Iphone" Nokia 5 funzt how crazy! And that for just about 100, - €

I did not buy the mobile because it was the "newest" but because it needed a good deal and also 100 euro

The seller probably knew why he sold.