{"id":2767,"date":"2026-04-07T01:52:54","date_gmt":"2026-04-07T01:52:54","guid":{"rendered":"https:\/\/neonledstrip.com\/?p=2767"},"modified":"2026-04-07T01:52:55","modified_gmt":"2026-04-07T01:52:55","slug":"led-strip-not-working-after-cutting","status":"publish","type":"post","link":"https:\/\/neonledstrip.com\/es\/led-strip-not-working-after-cutting\/","title":{"rendered":"\u00bfLa tira LED no funciona despu\u00e9s de cortarla? \u00bfPor qu\u00e9 y c\u00f3mo solucionarlo?"},"content":{"rendered":"<p>LED light strips are energy-efficient, can be cut, and are easy to install, while also supporting custom sizes. However, many users may encounter a common problem during installation\u2014the LED light strip doesn&#8217;t working after cutting. So what exactly causes this phenomenon? In this article, we will analyze the reasons for this problem in detail and provide relevant solutions to help you easily solve this issue. More details, pls read <a href=\"https:\/\/neonledstrip.com\/es\/como-funcionan-las-tiras-de-luces-led\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u00bfC\u00f3mo funcionan las tiras de LED?<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-why-can-led-strip-lights-only-be-cut-at-specific-locations\">\u00bfPor qu\u00e9 las tiras de luz LED s\u00f3lo se pueden cortar en lugares espec\u00edficos?<\/h2>\n\n\n\n<p>LED strips cannot be arbitrarily cut; the circuit board for each LED is pre-designed. If you look closely at the light strip, you&#8217;ll see a pair of copper contact points marked with a scissor icon at short intervals. These are the designated cutting points; you can only cut at these locations.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/neonledstrip.com\/wp-content\/uploads\/2026\/04\/led-strip-not-working-after-cutting.webp\" alt=\"La tira LED no funciona despu\u00e9s de cortarla mostrando una conexi\u00f3n rota y una secci\u00f3n sin iluminar\" class=\"wp-image-3376\" srcset=\"https:\/\/neonledstrip.com\/wp-content\/uploads\/2026\/04\/led-strip-not-working-after-cutting.webp 800w, https:\/\/neonledstrip.com\/wp-content\/uploads\/2026\/04\/led-strip-not-working-after-cutting-300x188.webp 300w, https:\/\/neonledstrip.com\/wp-content\/uploads\/2026\/04\/led-strip-not-working-after-cutting-768x480.webp 768w, https:\/\/neonledstrip.com\/wp-content\/uploads\/2026\/04\/led-strip-not-working-after-cutting-18x12.webp 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>El principio subyacente es el circuito en paralelo. Una tira de luz LED se compone de m\u00faltiples unidades emisoras de luz independientes conectadas en serie y en paralelo. Cada punto de corte representa el final de una unidad de circuito completa y el principio de la siguiente. Dentro de cada unidad, los LED y las resistencias est\u00e1n conectados en serie, mientras que las propias unidades est\u00e1n conectadas en paralelo.<\/p>\n\n\n\n<p>Cuando se corta en el punto correcto, s\u00f3lo se separa una unidad paralela completa del circuito general sin afectar a la trayectoria de la corriente dentro de esa unidad. Por eso, la parte restante y la parte cortada pueden funcionar de forma independiente.<\/p>\n\n\n\n<p>Por el contrario, si corta en el lugar incorrecto, interrumpir\u00e1 el circuito dentro de esa unidad, haciendo que esa unidad y todas las unidades posteriores no se enciendan.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-common-reasons-why-led-strip-don-t-working-after-cutting\">Common Reasons Why LED Strip Don&#8217;t Working After Cutting<\/h2>\n\n\n\n<p>Las tiras de LED est\u00e1ndar tienen 5 metros por bobina, por lo que es necesario cortarlas durante la instalaci\u00f3n. Por supuesto, algunas se fabrican a medida. Al cortar, preste mucha atenci\u00f3n a la ubicaci\u00f3n del corte. Aqu\u00ed hay cinco culpables principales que causan que la tira LED no funcione despu\u00e9s de ser cortada.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-incorrect-cutting-position\">Posici\u00f3n de corte incorrecta<\/h3>\n\n\n\n<p>This is the most common reason why LED strips won&#8217;t light up after being cut. As mentioned earlier, the cut must be made precisely in the middle of the copper pads marked with scissors.<\/p>\n\n\n\n<p>If you cut anywhere else between the two pads, it&#8217;s equivalent to severing the delicate FPC (Flexible Printed Circuit) wiring inside the strip. Current cannot flow, and naturally, it won&#8217;t light up.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-reversed-positive-and-negative-terminals\">Terminales positivo y negativo invertidos<\/h3>\n\n\n\n<p>LED son las siglas de Light Emitting Diode (diodo emisor de luz), y su caracter\u00edstica principal es la conductividad unidireccional. La corriente s\u00f3lo puede entrar por el terminal positivo (+) y salir por el negativo (-).<\/p>\n\n\n\n<p>En <a href=\"https:\/\/neonledstrip.com\/es\/como-cortar-y-soldar-neon-flex\/\" type=\"post\" id=\"2183\" target=\"_blank\" rel=\"noreferrer noopener\">cortar una tira de LED<\/a>, es necesario volver a encenderla. Si invierte los terminales positivo y negativo al volver a conectar la tira cortada, la tira no se encender\u00e1 en absoluto.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-damaged-or-cold-solder-joints\">Juntas de soldadura da\u00f1adas o fr\u00edas<\/h3>\n\n\n\n<p>Si opta por conectar la tira de LED mediante soldadura, se requiere un cierto nivel de habilidad para soldar. Las juntas de soldadura fr\u00edas (la soldadura no hace buen contacto con las almohadillas y los cables) o los cortocircuitos (el exceso de soldadura hace que los terminales positivo y negativo se conecten) har\u00e1n que la tira de LED no se encienda.<\/p>\n\n\n\n<p>Adem\u00e1s, utilizar un soldador sobrecalentado o mantenerlo demasiado tiempo puede da\u00f1ar las fr\u00e1giles almohadillas de cobre y hacer que se despeguen del sustrato flexible.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-led-strip-voltage-mismatch\">Desajuste de la tensi\u00f3n de las tiras de LED<\/h3>\n\n\n\n<p>Las tiras de LED funcionan con distintos voltajes, normalmente 12 V y 24 V. Nunca deben mezclarse. Si conectas una tira de 12 V a una fuente de alimentaci\u00f3n de 24 V, los LED se quemar\u00e1n al instante debido al exceso de tensi\u00f3n.<\/p>\n\n\n\n<p>Por el contrario, conectar una regleta de 24 V a una fuente de alimentaci\u00f3n de 12 V har\u00e1 que la regleta no se encienda o tenga un brillo extremadamente bajo.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-led-strip-damage-or-circuit-board-breakage\">Da\u00f1os en la tira LED o rotura de la placa de circuito<\/h3>\n\n\n\n<p>Sometimes the problem isn&#8217;t with your handling. The LED strip itself may have suffered physical damage during shipping or installation, such as tiny cracks in the FPC circuit board that are difficult to see with the naked eye.<\/p>\n\n\n\n<p>It&#8217;s also possible that excessive force was used during installation or cutting. This can damage adjacent solder pads and cause the LED strip to fail to light up.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-how-to-properly-cut-led-strips\">\u00bfC\u00f3mo cortar correctamente las tiras de LED?<\/h2>\n\n\n\n<p>Dominar el m\u00e9todo de corte correcto es clave para garantizar el buen funcionamiento de las tiras LED. Por lo general, es necesario cortar las tiras de LED.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"C\u00f3mo cortar, soldar y conectar tiras de LED COB\" width=\"720\" height=\"405\" src=\"https:\/\/www.youtube.com\/embed\/y2lZQs4lfg8?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-1-power-off-operation\">Paso 1: Operaci\u00f3n de apagado<\/h3>\n\n\n\n<p>Antes de cortar la tira de LED, desconecte siempre la alimentaci\u00f3n el\u00e9ctrica. Aseg\u00farese de que la tira est\u00e1 completamente apagada. Cortar mientras el circuito est\u00e1 bajo tensi\u00f3n no s\u00f3lo es peligroso, sino que tambi\u00e9n puede da\u00f1ar la tira debido a un cortocircuito moment\u00e1neo.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-2-precise-positioning\">Paso 2: Posicionamiento preciso<\/h3>\n\n\n\n<p>Lay the LED strip flat on the work surface and carefully locate the cutting marks using sufficient light. These marks are usually indicated by a scissor icon, dotted lines, or the word &#8220;CUT HERE,&#8221; and are fixed in the center between the two copper foil pads.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-3-tool-selection\">Paso 3: Selecci\u00f3n de herramientas<\/h3>\n\n\n\n<p>Para cortar hay que utilizar tijeras afiladas o una navaja multiusos. Las herramientas sin filo comprimir\u00e1n la placa de circuito, pudiendo provocar deformaciones o incluso la rotura de la l\u00e1mina de cobre interna. Se recomienda a los usuarios profesionales que utilicen tijeras espec\u00edficas para componentes electr\u00f3nicos para conseguir un corte m\u00e1s limpio.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-4-vertical-cutting\">Paso 4: Corte vertical<\/h3>\n\n\n\n<p>Mantenga la cuchilla perpendicular a la superficie de la tira de luz y realice un corte \u00fanico y r\u00e1pido; evite los cortes repetidos o en \u00e1ngulo. El borde cortado debe quedar limpio y liso, sin rebabas ni restos de pl\u00e1stico desgarrado.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-5-inspect-the-cut\">Paso 5: Inspeccionar el corte<\/h3>\n\n\n\n<p>Inmediatamente despu\u00e9s de cortar, inspeccione ambos extremos del corte para asegurarse de que las almohadillas de l\u00e1mina de cobre quedan totalmente expuestas. La superficie de las almohadillas debe estar lisa y plana, sin restos de pl\u00e1stico que la cubran; esto es crucial para las conexiones posteriores.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-6-protective-treatment\">Paso 6: Tratamiento de protecci\u00f3n<\/h3>\n\n\n\n<p>Si el extremo cortado de la tira de LED no se va a utilizar inmediatamente, se recomienda envolver las almohadillas de soldadura con cinta aislante para evitar la entrada de polvo y humedad, o para evitar cortocircuitos accidentales.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-summary\">Resumen<\/h2>\n\n\n\n<p>Cortar correctamente las tiras de luz LED es esencial para garantizar su correcto funcionamiento posterior. Confiamos en que ahora conozca a fondo el funcionamiento de las tiras de LED, las t\u00e9cnicas de corte y la resoluci\u00f3n de problemas. Ha pasado de comprender <em>por qu\u00e9<\/em> pueden cortarse a sabiendas de c\u00f3mo evitar los escollos que las provocan <em>no<\/em> para iluminar. Si necesita tiras de luz LED o <a href=\"https:\/\/neonledstrip.com\/es\/tira-de-neon\/\" type=\"link\" id=\"https:\/\/neonledstrip.com\/neon-strip\/\" target=\"_blank\" rel=\"noreferrer noopener\">ne\u00f3n flex<\/a>, No dude en ponerse en contacto con nosotros.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-faqs\">Preguntas frecuentes<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1762571454062\"><strong class=\"schema-faq-question\">\u00bfC\u00f3mo distinguir entre tiras de luz LED de 12 V y 24 V?<\/strong> <p class=\"schema-faq-answer\">It is quite easy to distinguish between them; you can check the information printed on the packaging or look for the labels &#8220;DC12V&#8221; or &#8220;DC24V&#8221; clearly printed directly on the LED strip&#8217;s PCB board.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1762571455076\"><strong class=\"schema-faq-question\">\u00bfSe puede seguir utilizando un segmento muy corto de una tira de LED de forma independiente despu\u00e9s de cortarlo?<\/strong> <p class=\"schema-faq-answer\">S\u00ed, es posible. Siempre que cortes en el lugar correcto y puedas suministrar una fuente de alimentaci\u00f3n compatible -ya sea mediante soldadura o utilizando un conector en miniatura-, cualquier segmento de la tira luminosa que sea m\u00e1s largo que una sola unidad de corte puede funcionar de forma independiente.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1762571455742\"><strong class=\"schema-faq-question\">\u00bfSe pueden cortar las tiras de luz LED en cualquier sitio?<\/strong> <p class=\"schema-faq-answer\">No, las tiras de luz LED s\u00f3lo pueden cortarse en lugares espec\u00edficos. Debe seguir las l\u00edneas de corte designadas marcadas en la tira. Un corte incorrecto puede impedir que la tira de luz funcione correctamente o provocar da\u00f1os en el circuito. Cada tira de luz cuenta con puntos de corte predise\u00f1ados.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1762571456283\"><strong class=\"schema-faq-question\">Why won&#8217;t an LED strip light up after being cut?<\/strong> <p class=\"schema-faq-answer\">Hay varias razones posibles. Entre las razones por las que una tira de LED puede no encenderse despu\u00e9s de ser cortada se incluyen: cortar en el lugar equivocado, invertir la polaridad positiva y negativa, juntas de soldadura da\u00f1adas, un desajuste de voltaje entre la tira y la fuente de alimentaci\u00f3n, o da\u00f1os en la placa de circuito.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1762571457534\"><strong class=\"schema-faq-question\">\u00bfAfecta el corte de una tira LED a su luminosidad o rendimiento crom\u00e1tico?<\/strong> <p class=\"schema-faq-answer\">Si el corte se realiza en el lugar correcto y el circuito permanece intacto, el brillo y el rendimiento crom\u00e1tico de la tira LED no se ver\u00e1n afectados. En general, el corte de la tira no modificar\u00e1 su efecto luminoso ni su rendimiento crom\u00e1tico.<\/p> <\/div> <\/div>","protected":false},"excerpt":{"rendered":"<p>LED light strips are energy-efficient, can be cut, and are easy to install, while also supporting custom sizes. However, many&#8230;<\/p>","protected":false},"author":1,"featured_media":3376,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[13],"tags":[316,318,317],"class_list":["post-2767","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-cut-led-strip-not-working","tag-how-to-cut-led-strip","tag-led-strip-repair"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.0 (Yoast SEO v27.1.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>LED Strip Not Working After Cutting? 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Provided that you cut at the correct location and can supply a compatible power source\u2014either through soldering or using a miniature connector\u2014any segment of the light strip that is longer than a single cutting unit can function independently.","inLanguage":"es"},"inLanguage":"es"},{"@type":"Question","@id":"https:\/\/neonledstrip.com\/led-strip-not-working-after-cutting\/#faq-question-1762571455742","position":3,"url":"https:\/\/neonledstrip.com\/led-strip-not-working-after-cutting\/#faq-question-1762571455742","name":"\u00bfSe pueden cortar las tiras de luz LED en cualquier sitio?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"No, LED light strips can only be cut at specific locations. You must follow the designated cutting lines marked on the strip. Improper cutting may prevent the light strip from functioning correctly or result in circuit damage. 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