{"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":"D\u00e9pannage et r\u00e9paration d&#039;\u00e9crans LED"},"content":{"rendered":"<h6><span style=\"color: #008080;\"><em>1) L&#039;\u00e9cran est enti\u00e8rement blanc ou ne fonctionne pas\u00a0:<\/em><\/span><\/h6>\n<p><em>\u2460 Probl\u00e8me d&#039;alimentation \u00e9lectrique : v\u00e9rifiez si l&#039;alimentation principale, l&#039;armoire de distribution et le disjoncteur sont allum\u00e9s, v\u00e9rifiez si la carte de l&#039;unit\u00e9 ou la carte de contr\u00f4le re\u00e7oit une alimentation de 5 V.<\/em><\/p>\n<p><em>\u2461 Le type de probl\u00e8me est li\u00e9 au syst\u00e8me de contr\u00f4le\u00a0; v\u00e9rifiez si l\u2019ordinateur fonctionne correctement, v\u00e9rifiez si la carte d\u2019envoi et la carte de r\u00e9ception sont aliment\u00e9es.<\/em><\/p>\n<p><em>\u2462Probl\u00e8me de connexion du signal\u00a0: v\u00e9rifiez si le c\u00e2ble r\u00e9seau entre la carte d\u2019\u00e9mission et l\u2019\u00e9cran d\u2019affichage est d\u00e9connect\u00e9, et assurez-vous que les param\u00e8tres de la carte graphique de l\u2019ordinateur sont en mode duplication.<\/em><\/p>\n<p><em>\u2463Probl\u00e8me de connexion du signal\u00a0: v\u00e9rifiez si le c\u00e2ble r\u00e9seau entre la carte \u00e9mettrice et l\u2019\u00e9cran est d\u00e9connect\u00e9, et assurez-vous que les param\u00e8tres de la carte graphique de l\u2019ordinateur sont r\u00e9gl\u00e9s sur le mode duplication.<\/em><\/p>\n<h6><span style=\"color: #008080;\"><em>2) L&#039;\u00e9cran entier ou une grande partie de l&#039;\u00e9cran pr\u00e9sente des anomalies\u00a0:<\/em><\/span><\/h6>\n<p><em>\u2460D\u00e9pannage des probl\u00e8mes de transmission du signal\u00a0: v\u00e9rifiez si le c\u00e2ble de signal HDMI ou DVI est mal connect\u00e9, v\u00e9rifiez la carte graphique ou la source vid\u00e9o, v\u00e9rifiez le c\u00e2ble r\u00e9seau.<\/em><\/p>\n<p><em>\u2461 Le syst\u00e8me de contr\u00f4le rencontre des probl\u00e8mes en raison d&#039;un programme de carte r\u00e9ceptrice corrompu, n\u00e9cessitant le renvoi du programme de carte r\u00e9ceptrice, les param\u00e8tres logiciels tels que la r\u00e9solution et le taux de rafra\u00eechissement ne correspondent pas.<\/em><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-17951\" src=\"http:\/\/cob-leddisplay.com\/wp-content\/uploads\/2026\/01\/Outdoor-led-screen.jpg\" alt=\"\" width=\"670\" height=\"893\" srcset=\"https:\/\/cob-leddisplay.com\/wp-content\/uploads\/2026\/01\/Outdoor-led-screen.jpg 670w, https:\/\/cob-leddisplay.com\/wp-content\/uploads\/2026\/01\/Outdoor-led-screen-9x12.jpg 9w\" sizes=\"auto, (max-width: 670px) 100vw, 670px\" \/><\/p>\n<h6><em><span style=\"color: #008080;\">3) D\u00e9faut partiel d&#039;\u00e9clairage dans l&#039;armoire ou le module\u00a0:<\/span><\/em><\/h6>\n<p><em>\u2460 En cas de panne d&#039;alimentation localis\u00e9e, v\u00e9rifiez que les lignes \u00e9lectriques et les bornes d&#039;alimentation dans la zone correspondante ne sont pas desserr\u00e9es ou br\u00fbl\u00e9es ; le voyant d&#039;alimentation est un outil de diagnostic important.<\/em><\/p>\n<p><em>\u2461Interruption de la liaison du signal pour v\u00e9rifier si le c\u00e2blage dans cette zone pr\u00e9sente un mauvais contact, v\u00e9rifiez la carte de r\u00e9ception dans cette zone.<\/em><\/p>\n<p><em>\u2462 Si le probl\u00e8me persiste apr\u00e8s avoir d\u00e9pann\u00e9 le mat\u00e9riel, il peut \u00eatre d\u00fb \u00e0 un dommage au module, \u00e0 la carte de r\u00e9ception, \u00e0 l&#039;alimentation ou \u00e0 d&#039;autres composants mat\u00e9riels, qui devront \u00eatre remplac\u00e9s.<\/em><\/p>\n<h6><span style=\"color: #008080;\"><em>4) Probl\u00e8mes d&#039;affichage locaux\u00a0: pixels morts, distorsion de l&#039;\u00e9cran ou d\u00e9fauts de couleur\u00a0:<\/em><\/span><\/h6>\n<p><em>\u2460Une seule LED qui ne s&#039;allume pas est g\u00e9n\u00e9ralement due \u00e0 une LED endommag\u00e9e, une panne g\u00e9n\u00e9ralis\u00e9e des LED peut \u00eatre li\u00e9e \u00e0 des dommages caus\u00e9s par une d\u00e9charge \u00e9lectrostatique ou \u00e0 des courts-circuits dans le c\u00e2blage.<\/em><\/p>\n<p><em>\u2461Le scintillement de l&#039;\u00e9cran, la distorsion des couleurs ou les motifs ressemblant \u00e0 des chenilles sont g\u00e9n\u00e9ralement caus\u00e9s par des interf\u00e9rences de signal ou des puces de pilote d\u00e9fectueuses ou des LED. Pour v\u00e9rifier et remplacer le c\u00e2ble de signal probl\u00e9matique, les probl\u00e8mes professionnels n\u00e9cessitent l&#039;attention d&#039;un technicien.<\/em><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-17954\" src=\"http:\/\/cob-leddisplay.com\/wp-content\/uploads\/2026\/01\/outdoor-led-.jpg\" alt=\"\" width=\"670\" height=\"893\" srcset=\"https:\/\/cob-leddisplay.com\/wp-content\/uploads\/2026\/01\/outdoor-led-.jpg 670w, https:\/\/cob-leddisplay.com\/wp-content\/uploads\/2026\/01\/outdoor-led--9x12.jpg 9w\" sizes=\"auto, (max-width: 670px) 100vw, 670px\" \/><\/p>\n<h4><span style=\"color: #008080;\"><em>5) Proc\u00e9dures de r\u00e9paration de base :<\/em><\/span><\/h4>\n<p><em>\u2460 Les proc\u00e9dures de mise hors tension, \u00e0 l&#039;exception de la v\u00e9rification du voyant d&#039;alimentation et des connexions des c\u00e2bles, toute op\u00e9ration impliquant le d\u00e9branchement des c\u00e2bles ou le remplacement des composants ne doit \u00eatre effectu\u00e9e qu&#039;apr\u00e8s la mise hors tension.<\/em><\/p>\n<p><em>\u2461 Inspection visuelle et localisation en premier lieu, observer la zone d\u00e9fectueuse et effectuer une \u00e9valuation pr\u00e9liminaire de l&#039;\u00e9tendue du probl\u00e8me, qu&#039;il s&#039;agisse de l&#039;\u00e9cran entier, d&#039;un bo\u00eetier sp\u00e9cifique, d&#039;une carte d&#039;unit\u00e9 particuli\u00e8re ou d&#039;un module sp\u00e9cifique.<\/em><\/p>\n<p><em>\u2462D\u00e9pannage \u00e9tape par \u00e9tape pour v\u00e9rifier dans l&#039;ordre suivant les lignes de signal d&#039;alimentation et le mat\u00e9riel de commande.<\/em><\/p>\n<p><em>\u2463Remplacement d&#039;un composant : coupez l&#039;alimentation de l&#039;\u00e9cran entier \u2013 D\u00e9branchez les c\u00e2bles d&#039;alimentation et de signal du composant d\u00e9fectueux \u2013 Retirez les vis de fixation \u2013 Retirez le composant d\u00e9fectueux, installez le nouveau composant et rebranchez les c\u00e2bles \u2013 Mettez sous tension et testez.<\/em><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-17953\" src=\"http:\/\/cob-leddisplay.com\/wp-content\/uploads\/2026\/01\/outdoor-advertising-led-screen.jpg\" alt=\"\" width=\"670\" height=\"893\" srcset=\"https:\/\/cob-leddisplay.com\/wp-content\/uploads\/2026\/01\/outdoor-advertising-led-screen.jpg 670w, https:\/\/cob-leddisplay.com\/wp-content\/uploads\/2026\/01\/outdoor-advertising-led-screen-9x12.jpg 9w\" sizes=\"auto, (max-width: 670px) 100vw, 670px\" \/><\/p>","protected":false},"excerpt":{"rendered":"<p>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 [&hellip;]<\/p>","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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