Sony PSP-1006 K - Manual (Page 134)

134 Troubleshooting
When the buttons are pressed, there are no key tones.
, Check that the Key Tone feature is turned on (
page 98).
The date and time are reset.
, If the battery is not recharged and runs out, or if the battery pack is replaced,
the system date and time settings may be reset. Follow the on-screen
instructions to set the time and date.
The PSP™ system is not recognized by the PC when connected
using a USB cable.
, When using a USB hub or other devices, depending on the operating
environment of the PC, the Memory Stick Duo™ inserted in the system
may not be recognized by the PC. Try connecting the system directly to the
PC using a USB cable.
You forgot your password.
, If you restore the system settings to the settings at the time of purchase, the
password will return to "0000". For details, see "Restore Default Settings"
(
page 93). Note that if you restore your settings, settings other than the
password will also be lost. Once these settings are lost, they cannot be
recovered.