Skyworth LCD TV 42L02RF orange light is not turned on failure repair example - Appliances

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The machine is faulty: the orange light is on and it is not turned on. User introductions can sometimes be turned on occasionally but not for long periods of time.
Check 5V, 12V, 24V normal, no sound, backlight is not bright! Carefully check the power board and motherboard, and no obvious solder joints were found. But when the power on orange light is on, the blue light is not on, there should be no 12V, and 24V output. Obviously there is a problem with the motherboard program. In addition, the previous user said that sometimes it can still be turned on, there should be bad contact. I didn't find the problem before finding one! I plan to buy a motherboard replacement. This machine is a good friend, it is not cheap to view the board. So search in this forum, but there is no maintenance case for this model! Fortunately, I found the same model repair case in other forums. This case is a poor resistance contact of R252. So I started looking for the resistor on the motherboard and found it for a long time. There is also a shield on the board, which is taken apart, and the resistor is not found! It was found that the LVDS joints were glued, and the glue was softened with alcohol, cleaned up, and the resistance was finally on the road. Repair the 100 ohm chip resistor, test machine: finally turned on. I have tried it several times after turning it on and off. It seems that this fault is a common problem of this model! Thank you for your friend who provided this repair case. At the same time, I hope this case will help more maintenance friends.