Error -9843 - This happens when you are logged out of i Tunes. Same situation might exist with ASR Error 6 - Device not detected on the computer USB port. Error 9 - Kernel is rejecting ASR because it's not been signed properly. Error 21 - Customer Firmware restore fail using Pwnage Tool.
You may have to put your i Phone or i Pad into DFU mode for the update or restore to work successfully.
To do so, follow the steps below: As a last resort, if none of the above solutions work, consider using another computer to restore or update your i Phone or i Pad.
Although I was told that it was a beta, I was also told it was official (Grand Master build), and in any case, I managed to (somehow) wipe out and reinstall the official i OS 6 from i Tunes.
Since I don't have the original OS, I downloaded 5.1.1 4S from Redmond Pie.
Go ahead and try restoring or updating your i Phone or i Pad in i Tunes and you shouldn’t get the 3194 i Tunes error anymore.
If the problem still persists, try the other solutions below.
On Mac, open System Preferences, then Network, and check your chosen connection options are working.
Now check your router isn't blocking your access to Apple's servers: bypass the router and connect directly to your modem via ethernet cable, then restart the modem (and the Mac or PC).
This solution may also work for the following errors: One of the reasons why i Tunes shows this error is because it cannot communicate with Apple’s update servers.