Exclamation [Q] [HELP] Device is dead!

Help me, please!
Hello guys, I really need an aid:
I was wiping my cache and dalvik-cache in recovery mode when the phone turned off. Since than it never turned on again and I can't access neither to bootload nor recovery, just black screen. I tried to change battery or charging it but it doens't. I even tried to plug it to the pc and it only plays the connection and disconnection notification chime in loop.
I don't know what else to do!!
Please, can someone help me??