Sony VGN-BX600 - Manual (Page 206)

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Troubleshooting
❑ On models with the ATI video controller, you may find your computer screen temporarily goes blank:
❑ when you connect or disconnect the AC adapter
❑ immediately after you start the computer with battery power
To solve this problem, follow these steps:
1 Click Start and then Control Panel.
2 Click Performance and Maintenance.
3 Click Power Options.
4 Select the VAIO Power Management tab.
5 Select Off for LCD Power-saving mode of both Plugged in and Running on batteries.
6 Click OK.