Keysight E4990A Installation Manual page 25

Troubleshooting
System Recovery
Procedure to execute the factory recovery
This section describes how to return the contents of the C drive to the factory
state.
You need a keyboard for this operation.
Step 1. Shut down the E4990A.
Step 2. Disconnect all of the USB device from the USB ports.
Step 3. Connect the keyboard to the E4990A.
Step 4. Press the standby switch of the E4990A to turn it ON.
Step 5. When the screen as shown in the figure below appears, select Keysight
Recovery System and press [Enter].
Figure 2-1 Keysight Recovery System selection screen
After several seconds, the next screen appears automatically even if you
do not press any key.
Step 6. In the Keysight Software End User License Agreement dialog box, select the
Agree button.
Keysight E4990A Impedance Analyzer 25