Sony PCG-F480 User Manual

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Troubleshooting
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 43.
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.
When you reconnect devices be sure to turn off the computer as described in “Shutting Down 
Your Computer” on page 14. Turning off the computer using other methods may result in 
data loss.