Samsung 5500 Series - Troubleshooting; Poor picture

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English
1. On your PC, click “Control Panel” on the Windows start menu.
2. Click “Appearance and Themes” in the “Control Panel” window. A display
dialog-box appears.
3. Click “Display”. Another display dialog box appears.
4. Click the “Settings” tab on the display dialog-box.
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On the Settings tab, set the correct resolution.
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If a vertical-frequency option exists on your display settings dialog box,
select ‘60’ or ‘60 Hz’. Otherwise, just click ‘OK’ and exit the dialog box.