{"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\/da\/led-strip-not-working-after-cutting\/","title":{"rendered":"LED-strip virker ikke efter klipning? Her er hvorfor og hvordan man l\u00f8ser det?"},"content":{"rendered":"

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’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 Hvordan fungerer LED-strips?<\/a><\/p>\n\n\n\n

Hvorfor kan LED-strips kun sk\u00e6res p\u00e5 bestemte steder?<\/h2>\n\n\n\n

LED strips cannot be arbitrarily cut; the circuit board for each LED is pre-designed. If you look closely at the light strip, you’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

\"LED-strip<\/figure>\n\n\n\n

Det underliggende princip er parallelle kredsl\u00f8b. En LED-lysstrimmel best\u00e5r af flere uafh\u00e6ngige lysemitterende enheder, der er forbundet i serie og parallelt. Hvert sk\u00e6repunkt repr\u00e6senterer afslutningen p\u00e5 en komplet kredsl\u00f8bsenhed og begyndelsen p\u00e5 den n\u00e6ste. Inden for hver enhed er lysdioderne og modstandene forbundet i serie, mens selve enhederne er forbundet parallelt.<\/p>\n\n\n\n

N\u00e5r du sk\u00e6rer p\u00e5 det rigtige sted, adskiller du kun en komplet parallel enhed fra det samlede kredsl\u00f8b uden at p\u00e5virke str\u00f8mbanen i den enhed. Det er derfor, den resterende del og den afsk\u00e5rne del kan fungere uafh\u00e6ngigt af hinanden.<\/p>\n\n\n\n

Hvis du derimod sk\u00e6rer det forkerte sted, vil du \u00f8del\u00e6gge kredsl\u00f8bet i den p\u00e5g\u00e6ldende enhed, hvilket f\u00e5r den og alle efterf\u00f8lgende enheder til ikke at lyse.<\/p>\n\n\n\n

Common Reasons Why LED Strip Don’t Working After Cutting<\/h2>\n\n\n\n

Standard LED-strips er 5 meter pr. rulle, s\u00e5 det er n\u00f8dvendigt at sk\u00e6re i dem under installationen. Nogle er selvf\u00f8lgelig specialfremstillede. N\u00e5r du sk\u00e6rer, skal du v\u00e6re meget opm\u00e6rksom p\u00e5 sk\u00e6restedet. Her er fem store syndere, der f\u00e5r LED-strips til ikke at fungere efter at v\u00e6re blevet klippet.<\/p>\n\n\n\n

Forkert sk\u00e6reposition<\/h3>\n\n\n\n

This is the most common reason why LED strips won’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

If you cut anywhere else between the two pads, it’s equivalent to severing the delicate FPC (Flexible Printed Circuit) wiring inside the strip. Current cannot flow, and naturally, it won’t light up.<\/p>\n\n\n\n

Omvendte positive og negative terminaler<\/h3>\n\n\n\n

LED st\u00e5r for Light Emitting Diode, og dens kerneegenskab er ensrettet ledningsevne. Str\u00f8mmen kan kun flyde ind fra den positive (+) terminal og ud fra den negative (-) terminal.<\/p>\n\n\n\n

N\u00e5r sk\u00e6re en LED-strimmel<\/a>, skal den t\u00e6ndes igen. Hvis du bytter om p\u00e5 plus- og minuspolerne, n\u00e5r du tilslutter den afsk\u00e5rne strimmel igen, vil strimlen absolut ikke lyse.<\/p>\n\n\n\n

Beskadigede eller kolde loddesamlinger<\/h3>\n\n\n\n

Hvis du v\u00e6lger at tilslutte LED-strippen ved hj\u00e6lp af lodning, kr\u00e6ves der et vist niveau af loddef\u00e6rdigheder. Kolde loddefuger (loddetinnet f\u00e5r ikke god kontakt med puderne og ledningerne) eller kortslutninger (for meget loddetin, der f\u00e5r plus- og minuspolerne til at forbinde) vil begge medf\u00f8re, at LED-strippen ikke lyser.<\/p>\n\n\n\n

Hvis man bruger en overophedet loddekolbe eller holder den for l\u00e6nge, kan det desuden beskadige de skr\u00f8belige kobberpuder og f\u00e5 dem til at l\u00f8sne sig fra det fleksible substrat.<\/p>\n\n\n\n

Sp\u00e6ndingsfejl i LED-strips<\/h3>\n\n\n\n

LED-strips arbejder med forskellige sp\u00e6ndinger, almindeligvis 12V og 24V. De m\u00e5 aldrig blandes. Hvis du tilslutter en 12 V-strip til en 24 V-str\u00f8mforsyning, vil LED'erne br\u00e6nde ud med det samme p\u00e5 grund af for h\u00f8j sp\u00e6nding.<\/p>\n\n\n\n

Omvendt vil tilslutning af en 24V-strip til en 12V-str\u00f8mforsyning medf\u00f8re, at strip'en ikke starter eller har ekstremt lav lysstyrke.<\/p>\n\n\n\n

Skader p\u00e5 LED-strips eller brud p\u00e5 kredsl\u00f8b<\/h3>\n\n\n\n

Sometimes the problem isn’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

It’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

Hvordan klipper man LED-strips korrekt?<\/h2>\n\n\n\n

At beherske den korrekte sk\u00e6remetode er n\u00f8glen til at sikre, at LED-strips fungerer korrekt. Sk\u00e6ring af LED-strips er generelt n\u00f8dvendigt.<\/p>\n\n\n\n

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