Yesterday, I was called to repair a Konka LED24F2210CE LCD TV. The issue was that when plugged in, the panel's blue light turned on, but none of the controls—whether through the remote or the buttons on the panel—worked. There was no backlight, no image, and no sound, as if the TV wasn't booting at all.
After opening the case, I didn’t notice any visible signs of damage or burnt capacitors on the power supply or backlight board. I tested the power supply voltages and found 12V and 5V to be normal. However, the DIM and ON/OFF signals were both at 0V, which indicated that the power supply itself was functioning properly. This narrowed down the problem to the motherboard, which had the following model number:
Next, I checked the voltage levels on the motherboard. All key voltages—12V, 5V, 3.3V, 1.8V, and 1.2V—were within normal ranges. At this point, I felt stuck. Since it was a 24-inch TV, replacing the motherboard would be expensive, and the customer might have just given up. But I refused to give up so easily. I wanted to understand what was wrong with the board and learn from the process.
I decided to look into the circuit outside the microcontroller. I tested the main crystal oscillator (27M) and confirmed it was oscillating correctly. That led me to suspect a problem with the storage component, specifically the 25Q64 IC. I searched for data on Taobao and came across some useful information. Inspired by the idea, I bought a replacement storage IC, burned the original firmware onto it, and replaced the old one on the motherboard.
To my relief, the TV booted up perfectly after the replacement. It was a huge satisfaction to see everything working again. I realized that sometimes, even if the cost is high or the solution seems complicated, the experience gained from fixing something is invaluable. I don’t know if I still feel that way about repairs now, but in that moment, I felt like I had truly earned my success.
Application scenario of horizontal bending
When the cable tray is laid indoors, if the straight section of the installation cable tray goes to the corner, it needs to make a turn. In this scene, the horizontal turn should be completed by connecting the horizontal elbow with the cable cable tray on both sides of the wall at 90 degrees respectively. If there is no other object at the corner of the corner, the Angle of horizontal bending can be 90°. If there are other objects, it can be designed to be 30°, 45°, 60° to fit on it.
The horizontal bend of a cable tray is an essential component in cable management systems. It is used to change the direction of cable trays horizontally, allowing for the routing of cables around obstacles such as walls or machinery. The horizontal bend is commonly used in industrial and commercial applications, where large amounts of cables need to be organized and protected.
Cable trays are used to support and protect cables in various applications. They are available in different materials such as steel, aluminum, and fiberglass. The horizontal bend is available in different sizes and materials to suit different cable tray systems.
One of the main advantages of the horizontal bend is its flexibility. It can be used to create a variety of angles and turns, allowing for efficient routing of cables. This flexibility also makes it possible to customize cable management systems to fit specific site requirements.
Another advantage of the horizontal bend is its durability. It is designed to withstand harsh environments and heavy loads, ensuring that cables are protected and supported at all times. The materials used in the construction of the horizontal bend are corrosion-resistant, making it suitable for use in outdoor and corrosive environments.
Horizontal Bend,Reducer Horizontal Bend,Standard Horizontal Bend,Offset Horizontal Bend
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