Sony VAIO VPCJ2 - Manual (Page 145)

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Troubleshooting >
Touch Screen
Touch Screen
What should I do if the touch screen does not work?
You may have disabled the touch screen. Use the wireless mouse to click Start, Control Panel, Hardware and Sound, and
Pen and Touch, and then click to select the Use your finger as an input device check box on the Touch tab.
What should I do if I cannot tap on the exact spot that I intend on the touch screen?
Changing the aspect ratio along with the screen resolution may cause loss of correct coordinates on the touch screen. In such
a case, follow these steps to calibrate the touch screen with the Control Panel.
1 Click Start, Control Panel, and Tablet PC Settings with the wireless mouse.
2 Click Calibrate on the Display tab.
3 Follow the on-screen instructions.