Usually when the touchscreen goes out its a software issue. I would have it replaced. you can allways try a soft reset. take out the battery. if that don't work back up your info and do a hard reset, that will wipe everythong out and reset the phone. if it still don't work, replace it.
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what type of phone is it? it sounds like your digitizer has either come loose or stopped working. I specialise with iPhones but on most displays youll have your LCD (picture) and your digitizer (touch screen) actualy attached to the screen is 2 ribbons which connect it to the motherboard in the phone. Your digitizer could be gone and hence why your touch screen wont work. either that or its came loose somehow.
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screen, if that doesn’t work. Reset the phone or use iTunes to restore the
phone to the factory defaults. If that doesn’t work you will need to take the
phone by the Apple store and have them check it out. The touch screen component
of the iPhone is like a second screen under the display; it can break and you
can still have a perfectly clear picture but no touch response.
You are simply in blackout mode. This is so at night you aren't blinded by the glow of a screen. Here are instructions right from the manual to turn on or off.
Blackout Mode On and Off
When Blackout mode is turned on, the monitor display will turn off to
reduce power consumption.
This additional power enhances the sound quality.
1 Touch [VISUAL] on the main source screen.
The VISUAL selection screen is displayed.
2 Touch [OFF].
The backlit-display portion goes out.
3 Touch [OFF] again to cancel the display backlight.
• To make the setting, set to “Setting the VISUAL Touch Button” (page
• If any button on the unit is pressed during Blackout mode, the
function will be displayed for 5 seconds to show the operation before
returning to Blackout mode.
• While the backlighting is turned off, the function indicator
There is no need to replace the whloe lcdscreen, you just need to replace the touch screen & panel which is a thin glasstop on the top of the lcdscreen. The whole lcdscreen is expensive, while a touch panel is much cheaper than that.
And we could provide all kinds of PDA accessories.
Here are some information for you
In general, PDA LCD screen comprises the touch screen. LCD screen acts as a display of PDA or SmartPhone, and the likes, which cannot go without LCD screen.
Touch screen is short for touch screen digitizer which seizes the upper part of PDA LCD screen. It is pressure-tactile, runs with gentle touch of stylus, finger and other tele-pointing function-possessed device. Different
from LCD screen, the touch screen is an optional component for PDA,
SmartPhone, and the likes. A PDA can function well even without the assembling of a touch screen for the availability of keyboard.