Panasonic TY-TP42P8-S Service Manual page 27

7.2.3. Set up
1. Check COM port number of Touch Panel from the menu of Touch Panel Setting Program(see Figure8.1. of Trouble Shooting)
or Device Manager of Windows(See the "Installation of the USB driver" of operating instruction).
The COM port number is necessary to set for this test program(see 8.2.4-2. COM port setting).
2. Change resolution of the PC monitor to higher than XGA(1024 x 768).
3. End the Touch Panel driver program by following procedure.
Press CTRL+ALT+DELETE to start Task Manager. Click the Applications tab, click the programs of "tpmenu" and "tpdrv", and
then click End Task(This test program cannot be used while Touch Panel driver is running).
Below is the example of Windows XP.
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TY-TP42P8-S / TY-TP50P8-S