As the output of the device, touch screens are also called touch panel. They are widely used in smart phones, computers (tablets), industrial control, public information inquiries, military, medical, and smart homes. When we use it, we may encounter some problems more or less. Then how do we check and repair when we face touch screen fails, and what kind of common faults does it have?
When the touch screen fails,please check it as follow:
the power supply of the control card is normal
the Windows driver is installed normally
the touch screen calibration under Windows is completed
the parameters in “Touch screen Control” are correct
the serial port is normal and the serial port is also checked Whether the line is connected properly.
The touch screen has no response after normal use for a period of time after being turned on. We dvide he touch screen fault analysis and processing into the following three situations:
1) In some applications, due to poor grounding performance, a large amount of static electricity will be applied to the control box shell. So it will affect the working electric field inside the control box and cause the touch to gradually fail. At this time, use a wire to ground the control box shell and restart it.
2) Because the surface of the surface acoustic wave touch screen is full of sound waves when it is working. If the touch screen is not wiped for a long time, excessive dust will accumulate and the reflection stripes of the wave will be blocked. It will cause the touch screen to fail to work normally. For touch monitors, clean business cards or banknotes can be used to gently wipe off the dust on the surrounding reflective stripes through the gap between the front cover of the monitor and the industrial touch screen. Then restart the computer. For touch all-in-ones, you can open the front cover of the display. Wipe off the dust on the surrounding reflective stripes with a clean towel, and then restart the computer.
3) Many touch all-in-one touch screen control boxes use the method of taking power from the all-in-one power supply instead of the main unit. So you should also check whether the 5V output of the all-in-one power supply is correct. Sometimes the instantaneous current is too large, causing the fuse to be burned. It is necessary to replace the fuse.
Touch screen, after touching the monitor screen with a finger, there is no response in some places. Failure analysis and treatment of partial non-response of the touch screen: It may be that the reflective stripes of the touch screen are partially covered, and can be wiped clean with a dry soft cloth. It is also possible that the reflective stripes of the touch screen are partially scraped off by hard objects and cannot be repaired.
The touch screen itself is normal after testing, but after connecting to the host, the computer cannot be operated. The touch screen is normal but we cannot operate the computer. Fault analysis and treatment: It may be that the touch screen control card receives the operation signal before the host starts loading the touch screen driver. You only need to restart the computer after turned off the power. It is also possible that the version of the touch screen driver is too low, and then need to install a latest driver.
Touch screen, after touching the monitor screen with your finger, it takes a long time to respond. The touch screen has a long response time. Fault analysis and treatment: It may be that there are moving water droplets on the touch screen, just wipe it with a dry soft cloth. It is also possible that the host grade is too low, such as the clock frequency is too low, if this is the case, it is best to replace the host.
After installing the driver, the touch screen does not respond for the first time. For a touch screen, the touch screen does not respond the first time after installing the driver. Touch screen fault analysis and treatment: first confirm whether the touch screen wiring is connected correctly. If not, connect all the wiring correctly after shutting down. Then check whether there are devices conflicting with the serial port resources in the host, check the hardware devices and adjust them.
The touch screen does not work, and there is no response when touching any part. Touch screen no response fault analysis and processing: first check whether each wiring interface is loose. And then check whether there is a conflict between the serial port and the interrupt number. If there is a conflict, adjust the resources to avoid the conflict. Then check whether there are cracks on the surface of the touch screen, if any, replace it in time.
Check whether there is dirt on the surface of the touch screen, if there is, remove it with a soft cloth. Check whether the indicator light on the control box is working properly. When it is normal, the indicator light is green and flashing. If the above parts are normal, we can check the touch screen by replacement method, first replace the control box. Then replace the industrial touch screen, and finally replace the host.
Here are something about the touch screen fails,hope this can help you.
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