The standard Yamaha factory reset procedure for many PSR Series keyboards will initialize the PSR System Setup Data, but not other data such as the MIDI Setup, Music Finder, and User Files/Folders; to do this, further steps are required (see below).

To Reset System Setup Only to Original Factory Settings:

1. Turn OFF the keyboard.
   
   
2. Press and hold down the rightmost white key (C) while turning ON the keyboard.
   
   
3. Once the power is ON, release the key. The keyboard will reinitialize the System Setup to the original factory settings.

To Reset All or Selected Settings to Original Factory Settings

WARNING:  All user-stored data (Registrations, User Styles, Multipads, User Voices, User Songs, MIDI settings) will be deleted. If the current settings and data are not expendable, create a backup before executing the Factory Reset. This can be done by performing a Bulk Dump to an external MIDI storage device or by saving the user-stored data to a floppy disk via the internal disk drive of the keyboard.

1. Press the [FUNCTION] button.
   
   
2. Press the [I] UTILITY button.
   
   
   
   
3. Use the [BACK] and [NEXT] buttons to display the SYSTEM RESET page in the screen.
   
   
   
   
4. Use the [A] - [E] buttons to select the desired data to be reset.
   
   
5. Press the [1A] FACTORY RESET EXECUTE button.
   
   
6. Press the [G] YES button to confirm.
   
   
7. Press the [G] YES button again to execute the reset.

PSR-2000 Owners Manual, p. 151.

PSR-2100 Owners Manual, p. 154.