Tethered jailbroken ipod touch 4g wont turn on after everything

[mtnhero]

-won't respond to dfu method to turn on
-computer will not recognize it at all
-ran out of batteries and screen remains black even after plugged in
-tried to use the redsn0w program to boot but it won't turn on
-held lock and home buttons for as long as they should be.

I went thru all the threads and found similar posts with the same solution that doesn't work for me help me out please.

[ipodtouchman77]

Try just letting it sit all by itself disconnected from everything for 24 hrs