How to Fix a Monitor?

How to Fix Monitor. after a few days I did not write in this blog because too busy with my job, so this time I will write about problem solving in damages Monitor

1. Image Not Appear

If the image does not appear, the problem is no signal generated images kemonitor. The solution is check the video signal contained in the CRT board video adapter, because this component might be damaged or burned.

2. Cable Heater On CRT Open.

Whenever CRT turned on, the heater will work. When the CRT is turned off, the heater also follow a cold. Heat changes repeatedly and in a long time will make the heater to be open and the heat seeping out of these cables. because the heater cable is composed of three kinds (red, green, blue) we can see the damage on the color will appear. However, this cable can not be replaced unless you replace the tube selaki katodanya same. When the cable is damaged, you practically have to replace your monitor with the new.

3. Cathode Connected with Grid Control.
Cathode is a material made of corrosion-resistant metal, making it possible to connect to the control grid. If this occurs, the control grid will lose efektivitaasnya, and will berakibatkan color that appears to be worn out faded alias. In general, these symptoms often appear. when it happens, nothing is impossible. It's best to prevent contact between the cathode and control grid, by providing a barrier between the control grid to the entire cathode.


4. One or More Colors Looks Weak.
If one or more colors seem weak, then this problem usually occurs because the cathode layer is formed which inhibits the release of ionic elektronmenuju screen. Symptoms of this kind makes the cathode becomes less effective in firing the electron, which causes weakness of color on the monitor screen. These symptoms will appear where any of the colors produced on the screen looks much weaker. check your drive CRT video board, whether the bonding solder on one of the jar is lax or loose. Solder bonding. When the picture was too blurry, the only possibility is to replace the tube. However, this kind of damage usually occurs only after long-term use.

5. Phosphorus In Cathode Tube Looks dull.
Phosphorus is a chemical compound that will bring up a certain color when exposed to high-energy electron beam. In the old monitors, we often come across a picture that looked haggard, with contrasting colors that can be arranged maksimal.Solusinya there is no other way except replacing cathode tubes, but the age of phosphorus can be saved by adjusting the brightness to a minimum and you can install the screen saver on the monitor screen to reduce the circulation of phosphorus that is too long.

6. Control Grid In CRT
Open.
Control grid used to limit generated by the cathode rays, by installing a potential charge on the grid. When the control grid is open, there is consequently no longer a potential charge on the grid to control the intensity of light and the light will radiate with full intensity
The solution, check whether the cathode to control the cathode occurred with gird heater short circuit (short) or not. If you do not find the short circuit (checked using a multimeter) control grid may have been open. The only solution tube should be replaced.

7. Grid Focus On Open CRT.
Oxidation can make a short circuit between the cathode with a control grid or control grid to screen grid. Screen grid serves to mengarajhakan movement of electrons toward the screen. When the screen grid mengalamu short circuit, electron energy radiating into the screen will be reduced so that will reduce the intensity of light that glowed in phosphorus and with
thereby reducing the overall image brightness. In some severe cases, it does not show the same picture sekali.Solusinya, you can gauge whether there is a short circuit on the screen grid or not, using a multimeter to measure voltage at
grid. Usually the grid has a voltage between 250 to 750 volts in a normal situation. When the voltage is too low, turn off the monitor and disconnect the drive board video in the neck tube and then restart the monitor and measure the voltage again. When the screen grid voltage returns to normal we can be sure that the screen grid short-circuiting. If the voltage remains low, we may suspect there is damage to the circuit yanhg regulate voltage to the screen.

8. Figure Looks Red or blue-green.
When the images appear red or blue-green (near cyan), the problem is there are problems in the video for the track circuit merah.Solusinya, make sure beforehand that control the monitor settings are at normal conditions. When the color control is set on a good condition while the color
redness is not too hilangh, check out the video drive circuit is connected with the color merh. We memerluan osiloscope to keep track of the video signal input and video output. If there tidk red video signal at the amplifier input, check the connection between the monitor with a video adapter board. When a good connection, try using another monitor that works well. If the problem still occurs on the monitor, replace the video adapter board on the monitor that is broken. We can compare the characteristics of the signal between the monitor is broken with a good monitor and draw conclusions, where lies the problem. If you do not have such equipment oscilloscope and not want complicated, just replace the entire board video adapter.

9. Figure Looks Old With Color Blue or yellowish color comes.
When the images look old in blue or yellowish color appeared, the problem is the video drive circuit rusak.Solusinya same blue line as the previous problem, you can travel the same way to check the source of the damage. Previously, we have to ensure that the color settings on
monitor is in normal position.

10. Figure Looks Old Red greenish or bluish.
If the picture looks dark greenish or bluish-red (near-magenta), the problem is
circuit drives the green line is broken. The solution is the same as the previous problem, you can enempuh the same way to check the source of the damage. For masaah last third, when the video signal is measured works well, but it still appears the same problem, suspect damage to the CRT itself. Likelihood, cathode or damaged gridnya control. If you have a tool to test CRT, check whether the jar is still good or have been worn out. When a bad result, like it or not you have to replace the tube.

11.Garis Horizontal or Vertical Screen Appears in the Middle.
If the horizontal or vertical lines appear in the middle of the screen, the problem involves damage to the horizontal drive circuit or vertikal. The Solusition for practical, you change the main monitor board. If you are a little bothered, you need to check the circuit that produces a vertical sweep of the board. Check that all cables connected properly. Sometimes, the damage was caused by loose cables due to excessive heat in the system monitor.

12. Images Only Appear in Section Up or Down Monitor.
When the images only appear at the top or bottom of the monitor, most likely the problem on the vertical amplifier solution, use an oscilloscope to check this amplifier. If there is no such tool, replace the main board of the monitor, then when the image was saved again, be sure to check the monitor vertical linearity.

13. No Picture Nor Raster.
If no picture or raster, the problem is the monitor cable connection to the CPU and video card is not working properly, or damaged circuits in the monitor.
The solution is make sure first that the CPU and video card work fine. After that, check the monitor is damaged and then try to turn the brightness and contrastnya. Begin by checking the vertical and horizontal synchronization signals. If there is no signal, it will not appear raster. When the signal is there, most likely the problem is the high voltage regulator circuit or the horizontal drive is not working properly handle it. If one output of power supply problems, we can overcome them by checking the power supply circuit or replace with a new power supply.

14. Characters that Appeared on Screen Not Perfect.
If the characters that appear on the screen is not perfect, the problem is the monitor disturbed by the presence of other devices that emit a specific wave. Other devices such as radios, televisions, cell phones, or other monitors that emit electromagnetic waves or generate magnetic fields.
The solution is keep the equipment causing interference. If the interference persists masalahnyab possibility is to monitor our own. Possible location of the problem is in the drive controller vertically or horizontally or both. When the speed of the sweeping raster changing screen, pixel
in an image that appears on the screen may be close together, while the other pixel diarea screen will appear too long. Try checking the vertical and horizontal lineariatas drive.

15. Display Looks Appears Wavy.
If the screen that appears looks wavy, the most likely source is the power supply.Solusinya, use a multimeter to check the output of each power supply to all components. If you've found the electricity supply problem, fix the electricity supply line to the place or for practical, just replace the power supply board it in its entirety.

16. Appears Color Changed When Monitor Heat.
If the color appears to change when the monitor is hot, most likely there is damage to the amplifier circuit video.Seharusnya, harusmemunculkan monitor the same color in both cold and hot conditions. Turn off the monitor and open the lid, and then began to check the video cable, particularly cable that connects the board with the inside of the monitor raster. When the connection is too loose, tighten it. Also check the connection between the video amplifier board by board raster.

17. The picture narrows to Monitor Heat When the Horizontal Direction.
When the images increasingly narrowed to a horizontal direction when the monitor is hot, the problem is one of the horizontal sweep of the regulator circuit is weak or change its value when the monitor is hot. The solution is turn off the monitor, laluy beralokasi check all capacitors around the horizontal output transistor. Often, this kind of problem is very difficult to detect, because it detects a damaged capacitor is very difficult. So, start from examining the connections between the circuits and solder wires. If the problem is not resolved, you need to do is to re-soldering all the components of the transistor and raster board.

18. Landscape Images to Monitor Heat When the Horizontal Direction.
Jikagambar widened to a horizontal direction when the monitor is hot, the problem with narrow horizontal image. The solution is the same as an image problem narrowed. When you do not want to check one by one component is problematic, you can simply replace the board with a new raster.

19. Image Details On Blurred High Resolution Graphics.
If the image detail at high resolution blurry graphics, video amplifier circuits are likely worn out or too weak. High resolution images require high bandwidth, so the video amplifier requires a fast response variations between pixels. When the video amplifier is weak, high-resolution images on will be slightly blurred. This problem will disappear when the monitor
working on a resolution rendah.Solusinya check the video amplifier that produces an electron beam. If there is damage, replace or repair parts of the course. Temporary solution, do not set the monitor at a resolution too high.

20. Figure Appears Broken-broken and Unstable.
When the images that appear broken and unstable, the voltage regulator circuit board raster or problematic. The solution circuit and check all connections on the board. Remember that the main source of producing the three primary colors that provide grain picture when it does not work perfectly when troubled. Re solder all the connections on the video amplifier board if necessary

Hopefully helpful

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