Simply follow the steps posted below to enable display or video mirroring on your 1st generation iPad. You should note that you will need to have jailbroken iPad 1 to enable video mirroring. Simply follow the steps posted here to jailbreak your iPad 1 on iOS 4.3.1 using Redsn0w 0.9.6rc9. Now follow the steps carefully.
How to Enable Video Mirroring on iPad 1
STEP 1. First you have install OpenSSH from Cydia on your iPad running iOS 4.3.1
STEP 2. Using SSH navigate to system/library/coreservices/springboard.app/
STEP 3. Now download the K48AP.plist file to your Mac and open it in plist editor.
STEP 4. Now simply add the following line and make sure the file looks like the below image:
display-mirroring boolean YES
STEP 5. Save and upload the file to iPad.
STEP 6. Now restart your iPad.
That’s it. Now you can start video mirroring on your 1st generation iPad using Digital AV Adapter. In this way you can enable display or video mirroring on your 1st generation iPad. You can watch the video embedded below to see it in action.