你可以下载510v4的说明书照着做,我copy到这里吧:
1 Make sure the SpeedTouch™ is powered off.
2 Press the power button once (shortly).
3 As soon as the Power/System LED is flashing green, press the power button
once more (shortly).
4 The Power/System LED stops flashing to become solid green. After six
seconds, it starts flashing green again. Press the power button once more
(shortly).
5 All LEDs flash green once.
6 The SpeedTouch™ reboots and will come online with factory default settings.
Resetting the system to its factory defaults also involves deleting the configuration
profile settings. You may, therefore, need to reconfigure the system
using the SpeedTouch™ Setup wizard or by uploading the relevant configuration
file. See section “1.3 SpeedTouch™ Configuration Setup” on page 13 for
more information.
很简单的英文,我不翻译了。