iPod not detected on redsnow or itunes

I restore my ipod to dfu ipsw firmware from redsnow and after restoring to the ipsw it shows black screen.When i open redsnow it shows that my ipod is in dfu mode.I could not exit dfu mode because the buttons of my ipod is broken or jammed.

On the next day,I open itunes and it is not showing my ipod so i restore to a firmware.It is also not showing on redsnow.

Help me please and thanks in advance