mobile

Hey guys, ive been using my note 3 for a long time with Temaseks CM12. yesterday everything was working perfect, until i couldnt hear any audio from the speaker. tried headphones, same for those. so I rebooted and rebooted until the players/whatsapp crashed when triyng to hear audio messsages or to make new ones. after a while i noticed some sounds like "interferrences" from the speaker, EVEN when the phone was off. (of course only with battery).
same thing with the headphone jack, tried also some speakers...
today it doesnt want to start at all. just this noises when attatching it to usb. no vibration atg all, display stays off...
I also tried debricking it with the debrick img, used 2 sd cards (2GB and 16GB) none of them worked.
the display just stays black, only the speakers are making funny noises.
No warrianty, so no support from samsung, latest rom was 9.5 or 9.7 from temasek (CM12.1)
please help mee :x its difficuklt to switch from 5.7 to 4 inches. thanks in advance and sorry for the bad language.
(P.S: i can upload a video to youtube if you want to.)