Black screen after new battery installed on iPod Touch 4th gen

While holding the home button down and volume up button, push and hold the power off button and hold that until you see the apple sign {quoted from another thread}

I did the above and my iPod 4th gen said, " the time is now 7:22 p.m."

I have tried all the resets, but still have a black screen.

My husband replaced my battery and I now have a black screen. I plugged the usb to my iMac and iTunes "sees" the iPod, but the finder (iMac) does not. I was able to make a backup while it was in iTunes. But the Restore Backup button is grayed out.

I just now opened iTunes and it detected my iPod wireless from my network. It is not showing up under devices in Finder on my mac.

My husband said a "cable" did not look right after he replaced the battery. He said he would have to open it up again to say where the cable was.

All help will be greatly appreciated.