Professional manufacturer of customized LED light strips since 2012.
COB light strip does not light up or partially does not light up after power on? Shenzhen Jomo Lighting has a solution!
2025-07-23
Common Problem Cause Analysis
Shenzhen Jomo Lighting Technology Co., Ltd., as a professional LED lighting supplier, often receives inquiries about COB light strips not lighting up. The following are common reasons that may cause COB light strips to not light up or partially not light up:
1. Power supply problem: insufficient power or damage to the power adapter
2. Connection problem: loose soldering points or poor contact
3. Line problem: PCB line breakage or short circuit
4. Installation problem: excessive bending of the light strip causes damage to the internal circuit
5. Voltage problem: input voltage does not match the rated voltage of the light strip
Shenzhen Jomo Lighting Technology Co., Ltd., as a professional LED lighting supplier, often receives inquiries about COB light strips not lighting up. The following are common reasons that may cause COB light strips to not light up or partially not light up:
1. Power supply problem: insufficient power or damage to the power adapter
2. Connection problem: loose soldering points or poor contact
3. Line problem: PCB line breakage or short circuit
4. Installation problem: excessive bending of the light strip causes damage to the internal circuit
5. Voltage problem: input voltage does not match the rated voltage of the light strip
Professional solution
For the above problems, Shenzhen Jomo Lighting recommends taking the following steps to troubleshoot and solve:
For the above problems, Shenzhen Jomo Lighting recommends taking the following steps to troubleshoot and solve:
1. Check the power adapter:
· Confirm that the adapter output voltage matches the light strip
· Test whether the adapter is working properly
· Ensure that the power cord is firmly connected
2. Check the light strip connection:
· Check whether the soldering points are firm
· Confirm that the positive and negative poles are connected correctly
· Check whether the connector is intact
· Check whether the soldering points are firm
· Confirm that the positive and negative poles are connected correctly
· Check whether the connector is intact
3. Segment test method:
· Test the long light strip in sections to locate the fault point
· Use a multimeter to detect the circuit on and off
· Test the long light strip in sections to locate the fault point
· Use a multimeter to detect the circuit on and off
Precautions
To avoid problems in the use of COB light strips, Shenzhen Jomo Lighting recommends:
· Choose COB light strip products with reliable quality
· Strictly follow the installation instructions
· Avoid excessive bending or folding of the light strip
· Use a matching power adapter
· Regular inspection and maintenance
To avoid problems in the use of COB light strips, Shenzhen Jomo Lighting recommends:
· Choose COB light strip products with reliable quality
· Strictly follow the installation instructions
· Avoid excessive bending or folding of the light strip
· Use a matching power adapter
· Regular inspection and maintenance
Shenzhen Jomo Lighting Technology Co., Ltd. provides high-quality COB light strip products and professional technical support. If you have any questions, please contact our professional team for solutions. We are committed to providing customers with the most reliable LED lighting products and the most complete technical support services.
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We focus on providing COB Strips,SMD Strips,Neon Strips,Flex Wall Washer Strips for various industries.
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Contact person: Bob Zhu
Email: jomolighting@jomolighting.com
Email: jomolighting@jomolighting.com
Tel: +86 15989421053
Company Add: 6th Floor, Building 8, Shiguan Industrial Park, Minsheng Avenue, Gongming Town, Shenzhen, China