I got this iPod touch 4th gen today. It worked initially but in between it showed a few weird screens and turned off and it would start again immediately. I thought if I would update this from iOS 5 to iOS 6 that would solve the problem. So I plugged it into my computer (Windows 7) and tried to update it from iOS 5 to iOS 6. Everything went well but at the end it returned error 1600 due to which the update was unsuccessful. Since then, the iPod has not started, nor is it charging. It just gets heated up when I plug it into the charger. It doesn't show any sign of charging. If I hold the sleep/wake button and home button together even for 60s it won't respond. It only gets recognized by iTunes that too with the same message "iTunes has detected an iPod in recovery mode. You must restore this iPod before it can be used with iTunes". I try to restore iPod and it shows error 1600 and I again get into the same cycle. Any help will be appreciated. I have wasted the past 5 hours over this.
Error 1600 would appear to be a USB connectivity error
From Get help with iOS update and restore errors
Check your USB connections
Errors: 13, 14, 1600, 1601, 1602, 1603, 1604, 1611, 1643-1650, 2000, 2001, 2002, 2005, 2006, 2009, 4005, 4013, 4014. You might also see a message that includes "invalid response."
If the USB connection between your device and computer is interrupted, you might not be able to update or restore.
To narrow down the issue, try different equipment:
- Use the USB cable that came with your device, or a different Apple USB cable.
- Plug your cable into a different USB port directly on your computer. Don't plug it into your keyboard.
- Try a different computer.
- Solve other issues with the USB connection, then with your security software.
If you still see the error message, check for hardware issues.
Also, you might need to troubleshoot your hardware. Try different cable, a different port, a different computer....