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You need to recalibrate the touchscreen. Try this: Turn off the Nuvi. Place your finger on the upper left-hand corner of the screen and then push down on the power button to turn the unit on. Release the power button when the Garmin logo appears. Continue to press on the upper left-hand corner of the screen until you see the calibration screen.
Go through the entire procedure of pressing each dot as it appears on the screen.
Once completed the Nuvi will display Calibration Complete This will recalibrate your touchscreen to the LCD display.
If this doesn't resolves your problem. then your touchscreen may be defective.
In order to calibrate the screen on the Nuvi 1260T, you need to follow these few simple steps.
- Turn off the device - Hold the upper-left corner of the screen while turning on the device - Release the power button when the Garmin screen appears - Continue to hold the upper-left corner of the touch screen for 30 seconds until a white screen with "Press dot" appears.
This should allow you to calibrate the screen. I hope this helps!
They're telling you that you have non-zero values stored in M1, M2, and M3. To clear any one of them, store 0 in it by pressing 0 n where n is 1, 2, or 3. To clear all three of them at once, press ON/AC.
See the display panel contrast button position(in the left side to user tools button.).If not work perform the touch screen adjustment:Press the total stop key(yellow)-1-9-9-3-clear/stop key(red button) x5 timeand press enter key(double croice).The graphic sensing adjustment screen will appear.Touch the upper left corner then the lower right corner of the panel using a pointed tool.Touch a few spots on the LCD and confirm that the marker appear on the screen at exacrly the same location as the pointed tip.Touch enter on the screen adjustment.Turn off the machine and back on to store the settings.
When you turn the calculator on, its screen is cleared, save for a small square on the top left corner. This is the cursor and it is blinking: The calculator is waiting for you to order it to perform some calculation.
Try this simple operation  [+]  [ENTER]. The calculator will display the result one line down justified to the right.
I was awaiting your response in chat session but could not get any thing.
Please hook cable box in Video input-7 instead of Video input-6 in TV and select Video input-7 with remote on TV.
Regarding continues on-screen display of video-6, press Display button on TV remote once, on-screen display will disappear.
Contrary to some opinions, you totally can. You only need to locate the "display screen information" button on your remote (on mine, it is at the very top, second on the left) and hit it once. Screen information will disappear. It took me a while to figure this out, but I am relieved that it eventually worked
Try to replace the Logic Scan board on the upper left side of your tv. The part no. is printed on the board and you can order it from Panasonic's Website. Also check the Service Manual for the part description and part no.