LG 710E CRT Monitor Repair With Blue Colour Missing
When you assume that electronic restore may be very troublesome to be taught then it's important to read this text the place solely through the use of a solder gun may resolve a Monitor coloration problem. After all there were many powerful dog instances (very tough to find out the fault) in digital restore however on the identical time there were additionally many circumstances that may be resolve by some simple ways. This LG 710E LG Monitor got here in with no blue coloration problem. How do I do know if the blue colour was missing? Merely run a color take a look at (that you may also obtain from the internet) or from a Monitor testing program generator, you can clearly see as which of the color is missing once you run the color bar test.
A missing blue shade in the Monitor may trigger the display to turn yellowish. Troubleshooting color problem is one of the best in Monitor repairing. Whether or not the lacking coloration is from blue, crimson or inexperienced there are some areas that you might want to examine as a way to successfully repair it. Listed below are among the points that it's essential verify:
- A bended coloration pin on the VGA connector. (If pin one is bend then there would be no pink color)
- A faulty VGA signal cable. If the interior wires have been broken then there can be missing colors. You may verify if the signal cable is good or bad by doing a continuity take a look at using a multimeter.
- Dry joints in the CRT board comparable to in the CRT socket pins, video pre amp and driver IC and even on the connector pins. In reality this downside contributed about 80% of Monitor shade problems. Applying recent solder would often resolve the color problem.
- A defective IC either in the Video Pre-amp or Video Driver IC.
- Faulty components within the CRT board. It could be a shorted driver transistor or even electrolytic capacitors that the ESR reading had shot up!
- A bad CRT socket. Typically decayed glue might cause the internal pins rusted and thus affecting the colors. Replacing only the CRT socket would definitely solve the problem.
- A weak or a faulty picture tube (CRT tube). Sure, I do got here across one of the electron gun (most probably the cathode supplies had used up) within the tube defective precipitated a lacking coloration within the screen. There is no approach to repair the sort of problem-the one way is to switch the CRT tube.
- Within the newer sort of Monitor, coloration setting is save in the EEPROM IC . Thus, if the EEprom information is corrupted, you'd also get a lacking coloration! The only approach to repair it's to reprogram the IC or use a smooth jig to tune it back the colour setting.
Now, which one of many above is the best to start out with first when comes to troubleshooting the colour problem? I consider you would agree with me that the first, second and the third are the simplest compare to the rest. Usually I'd hit the Monitor with my bare hands to see if there are any changes in color at the show (be careful to not hit too arduous till the casing damaged). If there's a change or flashes then I can say that the Monitor has dry joints. And if it stills the identical irrespective of what number of occasions I hit it, I'll then starts test the VGA connector and the cable.
In the above Monitor, the issue was dry joints because when I softly hit it with my hand in conjunction with the Monitor, the blue coloration instantly appears. The aluminum shielding at the CRT board was opened and I could clearly see numerous dry joints especially within the video pre amplifier and the video driver IC. Whenever you resolder please don't simply contact on the IC's only, you have to resolder others area as nicely like the CRT socket pins. Doing this could prevent any colour loss again within the future. A superb job would stop call back and to save lots of you time and money and most of all your popularity!
After every part was accomplished, you then need to softly knock on the CRT board again with the plastic handle of the screw driver to see if the color problem nonetheless exists. You may also knock on the principle board just in case there is any dry joints there. Yet another thing, should you find that the Monitor is a bit dusty, you may use a vacuum cleaner and a brush to wash up the soiled area.
Whether you're repairing the LG 710E or some other model of Displays, should you come throughout any monitor color problem, you can at all times use the procedure above to search out out the fault. If the VGA sign cable is okay and there have been no dry joints in the Monitor, I assume the only method is to use voltage testing methodology and begin checking elements with your tester or meter.
LG710E CRT Monitor Repair With Blue Colour Missing
When you assume that electronic restore may be very troublesome to be taught then it's important to read this text the place solely through the use of a solder gun may resolve a Monitor coloration problem. After all there were many powerful dog instances (very tough to find out the fault) in digital restore however on the identical time there were additionally many circumstances that may be resolve by some simple ways. This LG 710E LG Monitor got here in with no blue coloration problem. How do I do know if the blue colour was missing? Merely run a color take a look at (that you may also obtain from the internet) or from a Monitor testing program generator, you can clearly see as which of the color is missing once you run the color bar test.
A missing blue shade in the Monitor may trigger the display to turn yellowish. Troubleshooting color problem is one of the best in Monitor repairing. Whether or not the lacking coloration is from blue, crimson or inexperienced there are some areas that you might want to examine as a way to successfully repair it. Listed below are among the points that it's essential verify:
- A bended coloration pin on the VGA connector. (If pin one is bend then there would be no pink color)
- A faulty VGA signal cable. If the interior wires have been broken then there can be missing colors. You may verify if the signal cable is good or bad by doing a continuity take a look at using a multimeter.
- Dry joints in the CRT board comparable to in the CRT socket pins, video pre amp and driver IC and even on the connector pins. In reality this downside contributed about 80% of Monitor shade problems. Applying recent solder would often resolve the color problem.
- A defective IC either in the Video Pre-amp or Video Driver IC.
- Faulty components within the CRT board. It could be a shorted driver transistor or even electrolytic capacitors that the ESR reading had shot up!
- A bad CRT socket. Typically decayed glue might cause the internal pins rusted and thus affecting the colors. Replacing only the CRT socket would definitely solve the problem.
- A weak or a faulty picture tube (CRT tube). Sure, I do got here across one of the electron gun (most probably the cathode supplies had used up) within the tube defective precipitated a lacking coloration within the screen. There is no approach to repair the sort of problem-the one way is to switch the CRT tube.
- Within the newer sort of Monitor, coloration setting is save in the EEPROM IC . Thus, if the EEprom information is corrupted, you'd also get a lacking coloration! The only approach to repair it's to reprogram the IC or use a smooth jig to tune it back the colour setting.
Now, which one of many above is the best to start out with first when comes to troubleshooting the colour problem? I consider you would agree with me that the first, second and the third are the simplest compare to the rest. Usually I'd hit the Monitor with my bare hands to see if there are any changes in color at the show (be careful to not hit too arduous till the casing damaged). If there's a change or flashes then I can say that the Monitor has dry joints. And if it stills the identical irrespective of what number of occasions I hit it, I'll then starts test the VGA connector and the cable.
In the above Monitor, the issue was dry joints because when I softly hit it with my hand in conjunction with the Monitor, the blue coloration instantly appears. The aluminum shielding at the CRT board was opened and I could clearly see numerous dry joints especially within the video pre amplifier and the video driver IC. Whenever you resolder please don't simply contact on the IC's only, you have to resolder others area as nicely like the CRT socket pins. Doing this could prevent any colour loss again within the future. A superb job would stop call back and to save lots of you time and money and most of all your popularity!
After every part was accomplished, you then need to softly knock on the CRT board again with the plastic handle of the screw driver to see if the color problem nonetheless exists. You may also knock on the principle board just in case there is any dry joints there. Yet another thing, should you find that the Monitor is a bit dusty, you may use a vacuum cleaner and a brush to wash up the soiled area.
Whether you're repairing the LG 710E or some other model of Displays, should you come throughout any monitor color problem, you can at all times use the procedure above to search out out the fault. If the VGA sign cable is okay and there have been no dry joints in the Monitor, I assume the only method is to use voltage testing methodology and begin checking elements with your tester or meter.
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