ipod touch jail broke wont turn on

[Abadone]

so i downloaded the new 3.0 firmware and also jail broke with redsnow on my ipod touch and it worked great for about 4 days i then was having problems picking up network connections and read that i needed to put it in recovery mode and start over s i did connected it to my macbook turned my back for 2 mins came back and my itouch was black screen, after i waited to see if it would turn its self back on with the apple i noticed that itunes was not recognizing it at all. went to terminal but no devises were present. Have not been able to turn it back on since, tried ever way for rebooting, on button home button different amounts of time lengths but still nothing what did I do and how do I fix it?