itunes does not recognize the ipad 3

Hi Broken_Watch, thank you for posting in Apple Support Communities.

If the forgotten passcode process as per the following link https://support.apple.com/en-au/HT211078 did not work,

Can you also try the following link which also helps when a computer does not recognise a device https://support.apple.com/en-au/HT204095

If the issue persists, can I suggest that you make an appointment and have your [device] + your [accessory] inspected at an Apple Store or AASP (Apple Authorized Service Provider). 

You can do this as follows:

• Online:--> Genius Bar Reservation and Apple Support Options - Apple;
• Contacting a local Apple Store or AASP among the list provided above but also again as follows Apple – Location Selector; or
• Using the "Apple Support" app, available and downloadable from App Store.

An iPad passcode cannot be recovered, reset or modified from another device.

iPadOS 15.2 or later with a forgotten Passcode

Apple has introduced a new procedure with which to reset an iPad or iPhone with a forgotten Passcode - allowing you to use your AppleID and associated Password to reset your device.

How to reset your iPhone, iPad, or iPod touch when you forgot your passcode - Apple Support

You will be able to restore data from a pre-existing iCloud backup without the use of a computer, but will require a PC/Mac to restore data from an iTunes backup.

iPadOS 15.1 and earlier - and all devices that are Disabled



If your iPad is disabled, or you have forgotten your iPad passcode, you have no alternative other than to follow this process:

If you’ve forgotten the passcode on your iPad, or your iPad is disabled – Apple Support

You’ll need access to either a PC (with iTunes installed) or a Mac (with iTunes or Finder - as appropriate for the installed version of MacOS).

Download and use iTunes for Windows – Apple Support

Update to the latest version of iTunes – Apple Support

Use of a PC or Mac is unavoidable. If you don’t have access to a suitable computer of your own, that of a helpful friend or family member will suffice. Alternatively, the technicians at the Genius Bar of your local Apple Store will be delighted to assist.

If your iPad is not recognised by your computer when connected, try using a different USB port. This support page may also be helpful with troubleshooting connection issues:

If your computer doesn't recognize your iPhone, iPad, or iPod - Apple Support

You may also need your AppleID and associated password. If these have also been forgotten, they can be recovered here:

https://iforgot.apple.com

To recover your credentials, you’ll need access to one of the following:

• Your primary email address mailbox that corresponds with your AppleID
• Any of the secondary/recovery email addresses that should be configured for your AppleID account
• Any of the trusted telephone numbers (fixed line or Cellular/Mobile) that are associated with your AppleID

Unless you AppleID account has not been fully/correctly configured, or has been seriously neglected, recovery of the AppleID and password should not be difficult.

More information about recovery of your AppleID:

If you forgot your Apple ID - Apple Support

More information about recovery of your AppleID password:

If you forgot your Apple ID password - Apple Support

When you recover access to your credentials, you would be well advised to log-in to your AppleID account from a web browser - and verify/update any email addresses and trusted telephone numbers:

https://appleid.apple.com