Sony PCG-505TS Manual

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 or contains a bootable diskette, use 
the following procedure to initialize the BIOS:

1

Remove the floppy disk drive, port replicator, PC card, and any 
other peripheral devices. from the computer.

2

Turn the computer off and then turn it on again.

3

Turn on the computer and press the F2 key when the Sony logo 
appears. The BIOS setup menu screen appears.

4

Press the arrow keys to select the Exit menu.

5

Press the arrow keys to select Get Default Values and then press the 
Enter key. The message “Load default configuration now?” 
appears.

6

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

7

Press the arrow keys to select Exit (Save Changes) and then press 
the Enter key. The message “Save configuration changes and exit 
now?” appears.

8

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

When I turn on my computer, the message “C:\WINDOWS” appears and 
Windows does not start
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Enter “win”, then press the Enter key. When the message “MS-DOS is 
activated.  Do you want to return to Windows and restart 
applications?” appears, press the Enter key again. Windows starts.

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When shutting down your computer, follow the procedure in 
“Shutting Down Your Computer” on page 13.  Windows should start 
automatically the next time you turn on your computer.