LED display screens are still classified as electronic products according to the industry. As long as they are electronic products, they will inevitably fail during use. So what are the tips for repairing LED display screens?
Friends who have come into contact with LED display screens know that LED display screens are made up of LED modules piece by piece. As mentioned earlier, LED display screens are electronic products, so its basic structure is the display surface (lamp surface), PCB (circuit board), and control surface (IC component surface). Speaking of tips for repairing LED display screens, let's first talk about common faults. Common faults include: local "dead lights", "caterpillars", local color block missing, local black screen, large area black screen, local garbled code, etc. So how to repair these common minor faults? First of all, you need to prepare maintenance tools. The five treasures of LED display screen repairers: tweezers, hot air guns, soldering irons, multimeters, and test cards. Other auxiliary materials include: solder paste (tin wire), flux promoter, copper wire, glue, etc.
Partial "dead light" problem
Partial "dead light" means that one or several lights on the LED display screen are not lit. This kind of non-lighting is divided into full-time non-lighting and partial color non-lighting. Generally, this is a problem with the light itself, either damp or RGB chip damaged. Our repair method is very simple, just replace it with the spare LED lamp beads provided by the factory. The tools used are tweezers and hot air guns. After replacing the spare LED lamp beads, retest them with a test card. If there is no problem, it has been repaired.
"Caterpillar" problem
"Caterpillar" is just a metaphor. It refers to the phenomenon that when the LED display screen is powered on but there is no input source, a long dark light strip appears on some of the lamp surfaces, and it is mostly red. The fundamental reason for this phenomenon is that the internal chip of the lamp is leaking, or the IC surface line behind it is short-circuited. The former is the majority. Generally, when this happens, we only need to use a hot air gun to blow hot air along the discolored "caterpillar" of the leakage. When it blows to the problematic lamp, it is generally OK, because the heat causes the internal leakage chip connection to swell, but there are still hidden dangers. We only need to find the LED lamp bead with leakage and replace the hidden danger lamp bead according to the method mentioned above. If the row tube circuit on the back IC surface is short-circuited, you need to use a multimeter to specifically measure the relevant IC pin circuit and replace a new IC.
Partial color block missing
Friends who know about LED display screens must have seen this problem, that is, a small square block of different color appears when the LED display screen is playing normally. This problem is generally caused by the color IC behind the color block being burned out. The solution is to replace a new IC.
Partial black screen and large area black screen
Usually, when we say black screen, it means that when the LED display screen is playing normally, one or more LED modules show the phenomenon of not lighting up the entire area. We call it partial black screen when a few LED modules are not lighting up, and we call it large area black screen when more areas are not lighting up. When this phenomenon occurs, we usually consider the power factor first. Generally, check whether the LED power indicator is working properly. If the LED power indicator is not on, it is mostly because the power supply is damaged. Just replace a new power supply with the corresponding power. You should also check whether the power cord of the LED module corresponding to the black screen is loose. In many cases, re-twisting the wire head can also solve the black screen problem.
Local garbled characters
The problem of local garbled characters is more complicated. It refers to the phenomenon that the local area of the LED display screen appears messy and irregular color blocks that may flash randomly when the LED display screen is playing. When this problem occurs, we usually check the signal line connection problem first. You can check whether the cable is burned, whether the network cable is loose, etc. In maintenance practice, we found that the cable made of aluminum-magnesium wire is easy to burn, while the pure copper cable has a longer life. If the entire signal connection is checked, then swap the problematic LED module with the adjacent normal playing module, and basically you can judge whether it is possible that the LED module corresponding to the abnormal playback area is damaged. The cause of damage is mostly IC problems, and the maintenance and processing will be more complicated. I will not elaborate on it here.
Friends who have come into contact with LED display screens know that LED display screens are made up of LED modules piece by piece. As mentioned earlier, LED display screens are electronic products, so its basic structure is the display surface (lamp surface), PCB (circuit board), and control surface (IC component surface). Speaking of tips for repairing LED display screens, let's first talk about common faults. Common faults include: local "dead lights", "caterpillars", local color block missing, local black screen, large area black screen, local garbled code, etc. So how to repair these common minor faults? First of all, you need to prepare maintenance tools. The five treasures of LED display screen repairers: tweezers, hot air guns, soldering irons, multimeters, and test cards. Other auxiliary materials include: solder paste (tin wire), flux promoter, copper wire, glue, etc.
Partial "dead light" problem
Partial "dead light" means that one or several lights on the LED display screen are not lit. This kind of non-lighting is divided into full-time non-lighting and partial color non-lighting. Generally, this is a problem with the light itself, either damp or RGB chip damaged. Our repair method is very simple, just replace it with the spare LED lamp beads provided by the factory. The tools used are tweezers and hot air guns. After replacing the spare LED lamp beads, retest them with a test card. If there is no problem, it has been repaired.
"Caterpillar" problem
"Caterpillar" is just a metaphor. It refers to the phenomenon that when the LED display screen is powered on but there is no input source, a long dark light strip appears on some of the lamp surfaces, and it is mostly red. The fundamental reason for this phenomenon is that the internal chip of the lamp is leaking, or the IC surface line behind it is short-circuited. The former is the majority. Generally, when this happens, we only need to use a hot air gun to blow hot air along the discolored "caterpillar" of the leakage. When it blows to the problematic lamp, it is generally OK, because the heat causes the internal leakage chip connection to swell, but there are still hidden dangers. We only need to find the LED lamp bead with leakage and replace the hidden danger lamp bead according to the method mentioned above. If the row tube circuit on the back IC surface is short-circuited, you need to use a multimeter to specifically measure the relevant IC pin circuit and replace a new IC.
Partial color block missing
Friends who know about LED display screens must have seen this problem, that is, a small square block of different color appears when the LED display screen is playing normally. This problem is generally caused by the color IC behind the color block being burned out. The solution is to replace a new IC.
Partial black screen and large area black screen
Usually, when we say black screen, it means that when the LED display screen is playing normally, one or more LED modules show the phenomenon of not lighting up the entire area. We call it partial black screen when a few LED modules are not lighting up, and we call it large area black screen when more areas are not lighting up. When this phenomenon occurs, we usually consider the power factor first. Generally, check whether the LED power indicator is working properly. If the LED power indicator is not on, it is mostly because the power supply is damaged. Just replace a new power supply with the corresponding power. You should also check whether the power cord of the LED module corresponding to the black screen is loose. In many cases, re-twisting the wire head can also solve the black screen problem.
Local garbled characters
The problem of local garbled characters is more complicated. It refers to the phenomenon that the local area of the LED display screen appears messy and irregular color blocks that may flash randomly when the LED display screen is playing. When this problem occurs, we usually check the signal line connection problem first. You can check whether the cable is burned, whether the network cable is loose, etc. In maintenance practice, we found that the cable made of aluminum-magnesium wire is easy to burn, while the pure copper cable has a longer life. If the entire signal connection is checked, then swap the problematic LED module with the adjacent normal playing module, and basically you can judge whether it is possible that the LED module corresponding to the abnormal playback area is damaged. The cause of damage is mostly IC problems, and the maintenance and processing will be more complicated. I will not elaborate on it here.
