Z1 Problem , Noisy screen ?

[Ziomal19871]

Hello, I am the holder of the Sony Xperia Z1 (C6903) since 2 weeks (phone new, under warranty) so far very pleased with the smartphone ... but ... I noticed yesterday (or rather heard) that the phone began to make noise ... namely the pecking at the upper right corner of the screen you can hear "something" ... hard to tell me what is it? Is this a flaw? or damage?
I put a video to show what I mean? This is clearly audible in the video. Please help / advice.

Z1 problem Video
 
I would add that the problem reported by e-mail at the Sony support twice ... January 14, the day did not get any response (checked spam box) outside the survey on "how helpful has proven to be our response"
 
According to me the problem I act because the noise is increasingly loud ...
 
What do I do?

[Sophia]

If your phone can work normally, don't do anything , once open the phone to have a look, the phone may lose the waterproof  function.

Even you take it to the sony service,what they can do is to open the phone to find which part lossen or something else.

But, it depends on you. I have saw the whole process to tear down a Sony Z1,  and made the teardown video, i know how difficult to open the Sony Z1 because of its waterpoof.  So if your phone can work normally, you'd better leave it alone.