Yesterday, I was called to repair a Konka LED24F2210CE LCD TV. The issue was that when plugged in, the panel light turned blue, but there was no response from either the remote control or the buttons on the TV itself. There was no backlight, no image, and no sound—essentially, it didn’t boot at all. I took some photos of the problem for reference.
After opening the back cover, I checked the power supply and backlight capacitors, and found no signs of bulging or burning. Testing the power output showed that 12V and 5V were normal. However, the DIM and ON/OFF signals were both at 0V, which suggested the power supply was working properly. That narrowed the problem down to the motherboard, which had the following part number:
Next, I tested the voltages on the motherboard: 12V, 5V, 3.3V, 1.8V, and 1.2V were all within normal ranges. At this point, I was stuck. Since this was a 24-inch TV, replacing the motherboard would be quite expensive, and the customer might just give up. But I didn't want to lose this opportunity to learn and solve the problem.
I decided to investigate further, focusing on the circuit outside the microcontroller. I checked the main crystal oscillator (27M), which was oscillating normally. This led me to suspect a problem with the storage component, specifically the 25Q64 IC. I searched online and found the firmware data for this model on Taobao. Inspired by the idea, I purchased a replacement 25Q64 IC, burned the firmware onto it, and replaced the original one.
After reassembling the TV, it booted up perfectly. I felt a huge sense of satisfaction. I realized that if I had given up then, I would have missed out on a valuable learning experience. Even though the cost wasn’t insignificant, the feeling of accomplishment made it all worth it. It reminded me why I enjoy repairing electronics—it's not just about fixing things, but also about the journey and the knowledge gained along the way.
Abs Fiber Optic Trays are an essential component in fiber optic networks. They are designed to securely hold and protect fiber optic cables, connectors, and splices. These trays are made of ABS plastic, a thermoplastic polymer that is known for its strength and durability. They come in various sizes, shapes, and configurations to accommodate different fiber optic applications.
One of the key features of ABS Fiber Optic Trays is their ability to organize and manage fiber optic cables. The trays have multiple slots or compartments that can hold individual cables or cable bundles. This helps to prevent tangling, twisting, and damage to the cables, which can lead to signal loss and network downtime. The trays also have built-in cable management features, such as cable ties and clips, that further enhance cable organization and protection.
Another important function of ABS Fiber Optic Trays is to house fiber optic connectors and splices. The trays have specialized compartments or adapter panels that can hold different types of connectors, such as SC, LC, ST, and MTP. These compartments are designed to provide a secure and stable connection between the connectors and the fiber optic cables. The trays also have splice trays or fusion splice holders that allow for easy and efficient splicing of fiber optic cables.
ABS Fiber Optic Trays are also designed with ease of installation and maintenance in mind. They can be mounted on racks, cabinets, or walls using various mounting options, such as screws, brackets, or adhesive pads. The trays have removable covers or doors that provide easy access to the cables, connectors, and splices for installation, inspection, and maintenance. The covers or doors also protect the contents of the trays from dust, debris, and other environmental factors.
In addition to their functional features, ABS Fiber Optic Trays are also aesthetically pleasing. They have a sleek and modern design that blends well with other network equipment and infrastructure. The trays come in different colors, such as black, white, and gray, to match the color scheme of the network environment.
Overall, ABS Fiber Optic Trays are an essential and versatile component in fiber optic networks. They provide a secure and organized way to manage fiber optic cables, connectors, and splices, while also being easy to install and maintain. With their strength, durability, and aesthetic appeal, ABS Fiber Optic Trays are a reliable and cost-effective solution for any fiber optic network.
Abs Fiber Optic Trays,Aluminum cable trays in data room,Abs Optic Fiber Cable Tray,Grid cable trays in data room,PVC Fiber Optic Cable Trays
Rayhot Technology Group Co.,Ltd , https://www.cnrayhot.com