{"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\/it\/led-display-screen-troubleshooting-and-repair\/","title":{"rendered":"Risoluzione dei problemi e riparazione degli schermi LED"},"content":{"rendered":"<h6><span style=\"color: #008080;\"><em>1) L&#039;intero schermo \u00e8 vuoto o non funziona:<\/em><\/span><\/h6>\n<p><em>\u2460Problema di alimentazione: verificare che l&#039;alimentatore principale, il quadro di distribuzione e l&#039;interruttore automatico siano accesi; verificare inoltre che la scheda dell&#039;unit\u00e0 o la scheda di controllo ricevano alimentazione a 5V.<\/em><\/p>\n<p><em>\u2461Il tipo di problema riguarda il sistema di controllo; verificare che il computer funzioni correttamente e che la scheda di invio e quella di ricezione siano alimentate.<\/em><\/p>\n<p><em>\u2462Problema di connessione del segnale: verificare se il cavo di rete tra la scheda di invio e lo schermo \u00e8 scollegato e accertarsi che le impostazioni della scheda grafica del computer siano in modalit\u00e0 duplicata.<\/em><\/p>\n<p><em>\u2463In caso di problemi di connessione del segnale, verificare che il cavo di rete tra la scheda di trasmissione e lo schermo non sia scollegato e che le impostazioni della scheda grafica del computer siano impostate sulla modalit\u00e0 duplicata.<\/em><\/p>\n<h6><span style=\"color: #008080;\"><em>2) L&#039;intero schermo o un&#039;ampia area dello schermo presenta anomalie:<\/em><\/span><\/h6>\n<p><em>\u2460Risoluzione dei problemi di trasmissione del segnale: verificare se il cavo di segnale HDMI o DVI \u00e8 collegato in modo lasco, controllare la scheda grafica o la sorgente video, controllare il cavo di rete.<\/em><\/p>\n<p><em>\u2461Il sistema di controllo presenta problemi a causa di un programma della scheda ricevente danneggiato, che richiede il reinvio del programma stesso; inoltre, le impostazioni del software, come la risoluzione e la frequenza di aggiornamento, non corrispondono.<\/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) Mancata accensione parziale nell&#039;armadio o nel modulo:<\/span><\/em><\/h6>\n<p><em>\u2460In caso di guasti localizzati all&#039;alimentazione elettrica, verificare la presenza di allentamenti o bruciature sui cavi e sui terminali di alimentazione nella zona interessata; la spia di alimentazione \u00e8 un importante strumento diagnostico.<\/em><\/p>\n<p><em>\u2461Interruzione del collegamento del segnale: verificare se il cablaggio in quest&#039;area presenta un contatto difettoso, controllare la scheda ricevente in quest&#039;area.<\/em><\/p>\n<p><em>\u2462Se, dopo aver verificato i problemi hardware, il problema persiste, potrebbe essere dovuto a un danno al modulo, alla scheda ricevente, all&#039;alimentatore o ad altri componenti hardware, che dovranno essere sostituiti.<\/em><\/p>\n<h6><span style=\"color: #008080;\"><em>4) Problemi di visualizzazione locali: pixel morti, distorsione dello schermo o difetti di colore:<\/em><\/span><\/h6>\n<p><em>\u2460 Il mancato funzionamento di un singolo LED \u00e8 solitamente dovuto a un danno al LED stesso; un guasto diffuso dei LED pu\u00f2 essere correlato a danni da scariche elettrostatiche o a cortocircuiti nel cablaggio.<\/em><\/p>\n<p><em>\u2461Lo sfarfallio dello schermo, la distorsione dei colori o i motivi a bruco sono solitamente causati da interferenze di segnale, chip driver difettosi o LED difettosi; in caso di problemi gravi, \u00e8 necessario sostituire il cavo di segnale difettoso. I problemi pi\u00f9 complessi richiedono l&#039;intervento di un tecnico.<\/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) Procedure di riparazione di base:<\/em><\/span><\/h4>\n<p><em>\u2460 Procedure di spegnimento: fatta eccezione per il controllo della spia di alimentazione e dei collegamenti dei cavi, qualsiasi operazione che comporti lo scollegamento dei cavi o la sostituzione dei componenti deve essere eseguita solo dopo aver spento l&#039;alimentazione.<\/em><\/p>\n<p><em>\u2461Ispezione visiva e localizzazione preliminare: osservare l&#039;area difettosa ed effettuare una valutazione preliminare dell&#039;entit\u00e0 del problema, ovvero se riguarda l&#039;intero schermo, un involucro specifico, una particolare scheda o un modulo specifico.<\/em><\/p>\n<p><em>\u2462Risoluzione dei problemi passo passo per controllare, nel seguente ordine, le linee del segnale di alimentazione e l&#039;hardware di controllo.<\/em><\/p>\n<p><em>\u2463Sostituzione di un componente: scollegare l&#039;alimentazione dell&#039;intero schermo \u2013 Scollegare i cavi di alimentazione e di segnale del componente difettoso \u2013 Rimuovere le viti di fissaggio \u2013 Rimuovere il componente difettoso, installare il nuovo componente e ricollegare i cavi \u2013 Accendere e testare.<\/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) L&#039;intero schermo \u00e8 vuoto o non funziona: \u2460Problema di alimentazione: verificare se l&#039;alimentatore principale, il quadro di distribuzione e l&#039;interruttore automatico sono accesi, verificare se la scheda dell&#039;unit\u00e0 o la scheda di controllo riceve alimentazione a 5 V. \u2461Il tipo di problema \u00e8 correlato al sistema di controllo, verificare se il computer funziona correttamente, verificare se [\u2026]<\/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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