Unwanted Visitor Found In LG 43 Inch LED TV
The complaint of this LG 43″ Smart LED TV was no power. Once the TV cover was opened, I could see three boards; the main board, power board and the T-con board. Look at the photos below:
The main fuse was open circuit. I need to remove the power board and check for shorted components.
When I flipped the power board I was terrified for a while because I did not expect to see such a big gecko (unwanted visitor)! This is the reason why the main fuse was blown.
I need to clean the affected area with solution. After that I used hair dryer to blow the area to make it dry.
I began to check on the components in the primary power side. The main power FET was shorted but the power IC did not have any shorted reading.
I replaced the power FET and connect a light bulb to test the power supply.
The bulb went dimmed and this was a good sign that I can put in a replacement fuse and powered it up. I was happy when I saw the TV came back alive!
Conclusion- Troubleshooting and repairing TV power section was not tough if you know what you are doing. You must equipped with some knowledge in order to fix power supplies successfully. If you want to add more power supplies repair knowledge, I suggest that you check out Jestine’s Yong SMPS repair ebook here.
This article was prepared for you by Suranga Bandara who owns an Electronics repair shop in Anuradapura, Sri Lanka.
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