My phone is dead

Since tow days my phone didn't boot, and I search on internet about my problem and I find that I must make flashing by Odin program. So I download the specific Rom for my phone and I used latest version from Odin and every thing go Ok.

finally Odin said "Pass" with green and make restart for my phone.

and after that my phone become dead and nothing happend when I press the power button.

By the way, when I connect the phone to my laptop and I press volume up + power button I hear sound from computer but the phone is unknown device in Device Manager.

Now what I can do in this case?