Sony PCG-F520 User Manual

 Notebook User Guide

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When I turn on my computer, the message “Operating system not found” 

appears and Windows does not start
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Check the floppy disk drive to see if a non-bootable diskette is in the 
drive. 

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If a non-bootable diskette is in the drive, turn off the computer, remove 
the diskette, and then turn on the computer again. Confirm that Windows 
starts properly. If Windows still does not start, follow the procedure below 
to initialize the BIOS.

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If the floppy disk drive is empty, follow the steps below to initialize the 
BIOS:

Remove any peripheral devices connected to the computer.

Turn the computer off and then turn it on again.

Turn on the computer and press the F2 key when the Sony logo appears. 

The BIOS setup menu screen appears.

Press the arrow keys to select the Exit menu.

Press the arrow keys to select Get Default Values and then press the Enter 

key. The message “Load default configuration now?” appears. 

Check that Yes is selected, then press the Enter key.

Press the arrow keys to select Exit (Save Changes) and then press the Enter 

key. The message “Save configuration changes and exit now?” appears.

Check that Yes is selected, then press the Enter key. The computer restarts.

If your computer still displays the message “Operating system not found” and 
Windows does not start, contact Sony Customer Support.

My LCD does not display anything
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Check that the computer is plugged into a power source and that it is 
turned on. Check that the power indicator on the front panel of the 
computer is on.

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Check that the battery packs are inserted properly and that they are 
charged.

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The computer may be in LCD (Video) Standby mode. Press any key to 
activate the display.

The screen image on my external display is not centered or sized properly

Use the controls on your external display to adjust the image. See the manual 
supplied with your display for more information.