There are several ways to forget the power-on password: 1, update to the latest version of iTunes; ; 2. Enter DFU recovery mode for recovery; (DFU mode: 1. Turn off your iPhone2. Press and hold the On/Off button and the home button at the same time; 3. When you see the white Apple logo, please release the On/Off key and continue to press and hold the home button; 4. Open iTunes and wait for it to prompt you to resume mode, then press and hold the shift key on the keyboard, click "Resume" and select the corresponding firmware to resume. 3. Open the correct port and allow access to the Apple server; 4.USB fault diagnosis; 5. Restore on other computers. 6 select "Settings"-> in turn; General-> reset->; Reset all settings solved the problem.