{"id":17940,"date":"2026-01-23T05:45:32","date_gmt":"2026-01-23T05:45:32","guid":{"rendered":"https:\/\/cob-leddisplay.com\/?p=17940"},"modified":"2026-01-23T07:28:00","modified_gmt":"2026-01-23T07:28:00","slug":"led-display-screen-troubleshooting-and-repair","status":"publish","type":"post","link":"https:\/\/cob-leddisplay.com\/fr\/led-display-screen-troubleshooting-and-repair\/","title":{"rendered":"Led Display Screen Troubleshooting And Repair"},"content":{"rendered":"
1\uff09The entire screen is blank or not working:<\/em><\/span><\/h6>\n

\u2460Power supply issue check if the main power supply, distribution cabinet, and circuit breaker are switched on, check if the unit board or control card is receiving 5V power.<\/em><\/p>\n

\u2461The type of problem relates to the control system, check if the computer is working properly, check if the sending card and receiving card are powered on.<\/em><\/p>\n

\u2462Signal connection problem to check if the network cable between the sending card and the display screen is disconnected, confirm that the computer’s graphics card settings are in duplicate mode.<\/em><\/p>\n

\u2463Signal connection problem to check if the network cable between the sending card and the screen is disconnected, confirm that the computer’s graphics card settings are set to duplicate mode.<\/em><\/p>\n

2\uff09The entire screen or a large area of \u200b\u200bthe screen is displaying abnormalities:<\/em><\/span><\/h6>\n

\u2460Troubleshooting signal transmission issues to check if the signal cable HDMI or DVI is loosely connected, check the graphics card or video source, check the network cable.<\/em><\/p>\n

\u2461The control system is experiencing problems due to a corrupted receiver card program, requiring the receiver card program to be resent, software settings such as resolution and refresh rate are mismatched.<\/em><\/p>\n

\"\"<\/p>\n

3\uff09Partial failure to light up in the cabinet or module:<\/span><\/em><\/h6>\n

\u2460Localized power supply failures, check the power lines and power terminals in the corresponding area for looseness or burning, the power indicator light is an important diagnostic tool.<\/em><\/p>\n

\u2461Signal link interruption to check if the wiring in this area has poor contact, check the receiving card in this area.<\/em><\/p>\n

\u2462After troubleshooting the hardware and the problem persists, it may be due to damage to the module, receiving card, power supply, or other hardware components, which will require replacement.<\/em><\/p>\n

4\uff09Local display problems dead pixels or screen distortion or color defects:<\/em><\/span><\/h6>\n

\u2460A single led\u00a0 not lighting up is usually due to the led\u00a0 itself being damaged, widespread led\u00a0 failure may be related to electrostatic discharge damage, or short circuits in the wiring.<\/em><\/p>\n

\u2461Screen flickering or color distortion or caterpillar like patterns are usually caused by signal interference or faulty driver chips or led to heck and replace the problematic signal cable, professional issues require attention from a technician.<\/em><\/p>\n

\"\"<\/p>\n

5\uff09Basic repair procedures\uff1a<\/em><\/span><\/h4>\n

\u2460Power off procedures except for checking the power indicator light and cable connections, any operation involving unplugging cables or replacing components must be performed only after the power has been turned off.<\/em><\/p>\n

\u2461Visual inspection and localization first, observe the faulty area and make a preliminary assessment of the scope of the problem whether it’s the entire screen, a specific cabinet, a particular unit board, or a specific module.<\/em><\/p>\n

\u2462Step by step troubleshooting to check in the following order power supply signal lines control hardware.<\/em><\/p>\n

\u2463Replacing a component disconnect the power to the entire screen – Disconnect the power and signal cables of the faulty component – Remove the fixing screws – Remove the faulty component, install the new component, and reconnect the cables – Power on and test.<\/em><\/p>\n

\"\"<\/p>","protected":false},"excerpt":{"rendered":"

1\uff09The entire screen is blank or not working: \u2460Power supply issue check if the main power supply, distribution cabinet, and circuit breaker are switched on, check if the unit board or control card is receiving 5V power. \u2461The type of problem relates to the control system, check if the computer is working properly, check if 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