Computer not compatible with the the monitor

Is not compatible, in fact, failure is not the true sense of the incompatibility, but from the failure of performance phenomena and the use of language description "not compatible" word more appropriate. This failure is not rare, as more and more time using computers, monitors and the host's internal components are slowly aging capacitor is slowly become less, the resistance will have some changes, then it may be some inexplicable failure to give our service a great deal of trouble.

Following are some examples to illustrate how we solve such problems.

1, in the course of the law on the screen without a "frequency out of range" after the black

Assemble a computer, the display is grand HISAP 7002E 17 inch CRT flat screen monitors. Performance often fail at boot time or when you switch the game screen displayed on the CRT screen, "Frequency out of range" message, then, can not use the computer displays a black screen. Sometimes restarting the computer monitor and occasionally to return to normal, restarting it after most of the time is invalid.

Customers repeatedly repair, Dell INSPIRON 2500 battery maintenance staff found no problems after, while providing customers with alternative display no problems. Towed back to the customer's display companies, and other host connection test, all available display modes, each different test and change the refresh rate, failure never occurs. Failure due to the customer's machine is special, power monitors maintenance personnel checked the display and can not find the problem.

To avoid the customer again after repair, by replacing a new monitor, troubleshooting.

2, display a black screen erratic

An old CII850 computer graphics is the I740 8M, the motherboard is VIA chipset, display a patriot 700H 17-inch flat screen monitors.

Fault performance: the machine has been used in recent years, has been used properly. After the customer because of their work, the machine is moved to a construction site, the site's environment is more complex. Recent boot every morning, to hear the host normal start "beep" is heard, but did not display the image display. In order to solve the problem, the customer to monitor and hold to the host company for maintenance, in line with normal test; then connect the host and other displays are normal; the customer's display to connect to other hosts also normal.

After initially suspected poor performance led to the power line frequency and graphics output field frequency is not synchronized with the display caused by replacing power supply, the normal use of the three days, after the same failures. In the investigation of suspected over the display and graphics, easy to operate, first by replacing the video card, sent the same day when the good, the next day when the power failure has emerged.

After the customer to buy a used monitor troubleshooting.

3, severe jitter screen image

Grand 15-inch, 17-inch LCD with ASRock M266A motherboard assembled PC.

Fault performance: because ASRock M266A motherboard with integrated graphics. When using integrated graphics, the entire LCD screen images are clear and occasionally flashing the entire screen image jitter. Replace other brand LCD or CRT monitors did not find the fault, replace the graphics card with a grand display also did not find the problem.

4, monitor breathing effect is very obvious

Machine configuration: motherboard elite L41BMGL2, memory HY128MDDR, hard IBM40G, CPU is CIV1.7G, the power of up to Master ATX-300WB & P4 V2 .. 3 version, TCL M505 CRT monitor.

Fault performance: In the open window or close the window, the display is a very significant change, is what we usually call "breathing effect", the COMPAQ business notebook nx9000 Battery image edges of a wide range of close to 5MM, the computer did not work properly.

Found during the inspection, to the monitor connected to the other hosts on the breath test found no effect; to monitor the customer's host to connect to other respiratory effects have not been found, because there is no type of display with the same brand can not be tested. Judging the quality of the display itself is not the total, should belong to the causes of cases are compatibility problems.

5. Repair burned display

Customer Carry Tongfang host in maintenance using HISAP 17 inch 7002D CRT monitors.

Connection is correct, the power test machine, when the system has just entered the desktop, the display after the black smoke. Replacement of other displays, host starts normally, the customer is a software fault repair, no Internet access.

Cause: The client displays used at home, better performance, higher resolution and refresh rate settings, and HISAP display is low-end products, low bandwidth, but also not set a better protection. When the monitor is sent to the host receives the high resolution and high refresh rate, beyond the normal scope of work display, reaching the limits of FBT, resulting in overheating of the line scan circuit elements related to smoke and burn damage.

This is the burning software is set to one of the methods of hardware damage.

6, analysis of the main reasons causing the problem

Currently the interface between the computer and monitor used more or 15-pin VGA connector, which R, G, B three-color information is transmitted analog information through the RGB color signal strength, and vertical sync signals together to achieve the color and brightness of the image combination. Us in the CMOS settings when the power-saving options, including a set of display (Video Off Method), among them based on whether the line or field signal to turn off the monitor options. If the host signal is not sent even if the time line or field with three-color RGB signal, the display will not have the image appear. However, if in the course of the CASIO np-20 battery monitor to the line with the market signals sent by the host synchronization, then the display would not be out of the image.

The few cases of failure are very typical, is the line field and the host sent the signal strength and signal polarity of a relationship. Display to the graphics card in the receiving signals sent by the line number field to field first signal according to the polarity of the line ("ten" or "-") to select the display mode (resolution), while the MPU display will capture the signal line and market signals, the work force in the graphics display sent horizontal and vertical frequency, according to the host to set the resolution and refresh rate to work.

If the field lines because of serious interference or signal variation with frequency, resulting in the display card can not be sent with the signal line field line field sync signal or capture error occurs when the display is black or other unexpected failure, as the above example describe the same.

7, the solution to the problem

1, the new machine

If there is a new purchase of such machines, it should be judged as the two are not compatible, we can choose to replace the video card or motherboard, you can replace the display to resolve the issue.

2, the old machine

If the machine is in use after a few months or years of such problems, the general aging of the components inside the monitor or the graphics components caused by aging, generally we can use the replace method to replace the lowest value of the last parts as well.

For the upcoming popular DVI connector, because the use of digital signal transmission for horizontal and vertical frequency analog and digital signals are transmitted simultaneously, and can ensure the accurate capture and display synchronized with the host, not the above-mentioned anomalies.