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Flash Rom IC Caused Standby Problem in LED TV
A customer brought in his LG 32″ LED TV with the complaint of standby problem. The color of the power LED is red color. The TV can’t even be turned on with the help of remote control and front panel power button.
As usual, the first thing to do is to remove the cover and once the cover was removed I could see three circuit board; Power supply board, main board and the T-con board.
The below photo is the mainboard and this is where all the important memory ICs located. I have checked that all the ICs have good dc supply voltage in which I guessed the problem would be on the corrupted data in one of the memory ICs.
The memory IC that I suspected to have problem was the flash rom IC but because I do not have the similar IC with the programs in it, I can’t do anything about it. Fortunately I have a good friend working in LG service center and he had the original IC.
I soldered the new Flash Rom IC to the mainboard and powered on, the display immediately appeared and this confirmed the flash rom IC was the cause of the standby problem.
Assuming if after the replacement and the problem is still the same then I may have to get my repair friend to pass me the microcontroller IC.
Conclusion- Standby problems can be caused by corrupted data in memory ICs, improper dc voltage, shorted components and the main power supply itself. If you wish to learn the tips and know how about LCD/LED/OLED Repair you can go to Kent’s and Damon’s websites. Invest in the ebooks to gain experiences. Buying things such as shoes, shirts and etc are not experience. I hope you got my point.
This article was prepared for you by Suranga Bandara who owns an Electronics repair shop in Anuradapura, Sri Lanka.
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