Repair guides, disassembly, and troubleshooting information for the third-generation Apple iPad with Wi-Fi, available with 16, 32, or 64 GB of storage. Released in March 2012. Identified by model number A1426. Repairs require the use of heat and careful prying.
Are you writting about your iCloud details that you forgot??
by Bill
Is it jailbroken?
If so you can find passcode with libTransLock .
by Sajjad Aboutalebi