My Lumia 520 doesn't starts

[TBM 13]

Hello. I have an old Nokia Lumia 520. I have not used it for a long time. When i try to start it nothing happens. I tried charging the phone with its original charger for 4 hours and nothing, it doesn't even vibrates.
I tried a soft reset and a hard reset.

When i connect the phone to the computer nothing happens, but my computer makes the sound that i connected something and then makes the sound that i disconnected something but three times.

Someone knows how to solve this?

PS: Sorry for my bad english.

 

[TBM 13]

I tried turn it on a working battery from another Nokia Lumia 520 but still nothing.

Now when i connect to the PC instead of hearing the sound that i connected something, i don't hear anything because pc doesn't detects anything.