I own an Ibanez ART120 and yesterday it started "to die". I makes a sound similar to the one when you torn on the TV on a non frequency associated chanel, it sound like BUZZZZZZZZ...

I posted a video on YouTube so you can hear it better:
I really need help...

probably something in the electronics- check if all of the wires are attached
That is a strange sound, never heard that before.

Are you sure it isn't the amp?
Jackson RR24M - EMG ALX w/ ABQ installed
Ibanez Xiphos - stock
LTD Alexi 600 - stock
Ibanex RG - Tone Zone(bridge), PAF Pro(neck)
Blackstar HT-20H
Fulltone OCD
MXR 10 Band EQ
grounding issue, open up the guitar and check the wiring

to distinguish as to what is causing the buzz try another guitar into your amp(borrow a friends if you don`t have a 2nd guitar)

try your guitar into another amp (borrow a friends or blag the rep at the store)

try a different cable (they`re cheap enough and you should always have a backup)

from each scenario you`ll be able to isolate the cause to whether it`s guitar, amp or any thing in between

post back with the result we can then guide you on the best fix.