This afternoon, I helped a colleague fix a Skyworth LCD TV model 37L02RM. The issue was that there was no sound, no TV signal, and no AV input, but there was music every time the TV was turned on. At first, I checked the power board voltages: 5V, 12V (measured at 11.35V), and 24V (measured at 23.30V) all looked normal. All the capacitors were in good condition with no bulging or leakage. Then I moved to the motherboard and measured the voltages—1.2V, 3.3V, and 5V were all within normal ranges. I wasn't sure where to start next. Since the TV had sound and the image was working, I assumed the audio amplifier was functioning properly. Could it be a data corruption issue? I decided to try clearing the user memory, which was stored on a 93C32 chip. Unfortunately, I didn't have a programmer available at the moment, so I took a chance. With the TV off, I used a screwdriver to short pins 5 and 6 of the 93C32 memory chip, then turned the TV on. After a few seconds, I removed the screwdriver. To my relief, the program sound returned. It worked! Here are some photos of the process.
It's always interesting to troubleshoot these kinds of issues. Sometimes, even a small memory reset can bring everything back to life. I learned something new today, and I'm glad we could get the TV working again. If you ever face similar problems, don't hesitate to try simple solutions like resetting the memory. You might be surprised by how effective they can be.
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