Hold Power Switch UP (toward "Power") for 10-15 seconds until screen goes black
Release. Slide Power Switch up again to turn on
Closes game/app cleanly, reboots OS.
Hard Reset (Frozen/Unresponsive)
Remove Battery (back cover)
Wait 30 seconds
Reinsert battery
Hold Power Switch UP for 5 seconds to boot
Note: No external "Reset Button" exists on any PSP model (1000, 2000, 3000, Go, E1000). The "Reset" hole on PSP-1000 is for the WLAN switch hardware, not system reset.
Recovery Mode (CFW / Bricked)
Power off completely (Battery out/in)
Hold R Trigger + Power Switch UP simultaneously
Boots into Recovery Menu (if CFW installed) or Safe Mode (OFW)