Sony PCG-F280 Manual

This section describes how to solve common problems you may 
encounter when using your computer. Many problems have simple 
solutions, so try these suggestions before you call Sony Customer 
Support. 

My computer does not start
❑

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 indicates that the power is on.

❑

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

❑

Make sure there is no diskette in the floppy disk drive.

❑

Confirm that the power cord and all cables are connected firmly, as 
described in “Connecting Peripheral Devices” on page 41.

❑

If you plugged the computer into a power strip or UPS, make sure the 
power strip or UPS is turned on and working.

❑

If you are using an external display, check that it is plugged into a 
power source and turned on. Check that the brightness and contrast 
controls are adjusted correctly. See the manual that came with your 
display for details.

❑

Moisture condensation may have occurred. Do not use the computer 
for at least one hour and then turn on the computer.

❑

Your computer’s internal backup battery may be low on power. 
Change the backup battery located on the bottom of your computer, 
following the procedure in “Replacing the Internal Backup Battery” 
on page 66.

When I turn on my computer, the message “Operating system not found” 
appears and Windows does not start
❑

Check the floppy disk drive to see if a non-bootable diskette is in the 
drive. 

❑

If a non-bootable diskette is in the drive, turn off the computer, 
remove the diskette, and then turn on the computer again. Confirm 

✍

When you reconnect devices be sure to turn off the computer as described in “Shutting 
Down Your Computer” on page 15. Turning off the computer using other methods may 
result in data loss.