Connected to a Hisense 322E29 LCD TV, the screen shows a white boot. I decided to disassemble the unit and directly access the logic board. After inspection, I found that the power supply on the upper screen was burned out, so I replaced the fuse. However, I didn’t rush to power it up immediately—instead, I did some further checks. It seemed like a boost diode was faulty (though I wasn’t entirely sure what it actually was). There was a short at the front end. [attach]506125[/attach]
There were many patch components connected, making it hard to identify the exact short-circuit point. So I used my "burning chicken method." Since I didn’t know the working voltage here, I kept the "burning chicken" voltage below 1V (too high might damage the board). I couldn’t afford to take any risks, but I also didn’t believe the voltage would be under 1V.
I powered on the "burning chicken," and touched different components for a long time. None of them got warm, which made me really frustrated. I had bought an infrared thermometer for about 70 yuan just a few months ago, but I hadn’t used it much and now it’s broken.
Should I give up here?
Should I remove each component one by one?
Should I increase the "burning chicken" voltage?
Or should I just replace the whole board?
You know, in the maintenance world, people call this "personality repair." With over 30 years of experience fixing flashlights, I've even created my own "burning chicken Dafa" method (first you blow the fuse, then you proceed). I don't believe I'd lose to a small logic board.
I took out the imported solder paste I had bought two years ago and stored for two years. I applied a thin layer on the components that might be shorted.
[attach]506127[/attach]
I plugged it back in and adjusted the voltage to 0.8V. The current was 1.6A.
[attach]506128[/attach]
After just 10 seconds, the hidden destructive molecules in the solder paste started melting.
[attach]506129[/attach]
I removed the faulty part and tested again—the short circuit was gone.
[attach]506130[/attach]
That's it—repair completed.
Haha, if there's no solder paste, even if your family has lard, don’t try to use it. Vaseline or honey could work too, though not ideal.
Dear readers, my 20 years of maintenance experience is like a lot of hair—plenty of it. I’ll keep sharing more tips. Experience is valuable, so please raise your hands if you find it helpful. If you have money, support me with a donation; if not, just share this post. I'm still waiting for gold coins to buy a house. Thank you all, and may the gods bless you!
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