Detailed explanation of Changhong LCD TV LED39c3000i motherboard

Changhong LCD TV LED39c3000i logic board?

① To detect this fault, first measure whether the voltages of each group at the output end of the main switching power supply circuit are normal.

②. If the above measurements are normal, it means that the switching power supply circuit is not faulty, otherwise it is a problem with the switching power supply circuit. ③. Since the above are normal, then measure whether the power supply voltage of the logic board circuit is normal (normal is 12V. If not, check whether the mainboard power supply is normal, because the power supply of the logic board circuit is provided by the mainboard). ④. When the above inspections are normal, you can power on the machine and test the machine.

What should I do if Changhong TV changes the motherboard and the screen parameters are incorrect?

If the parameters of Changhong TV are incorrect after replacing the motherboard and screen, you can try the following solutions:

1. Check whether the connection between the motherboard and the screen is correct, and ensure that the plug and slot correspond correctly .

2. Try reinstalling or updating the TV’s driver and firmware to ensure compatibility with the new motherboard.

3. Contact Changhong After-sales Service Center to report the problem to them and seek professional help. They may need to further check and adjust the TV's settings and parameters, or provide solutions for replacing the correct motherboard screen.

The motherboard of my Changhong 43-inch TV is broken and it costs 500 yuan to repair. Is there a low price?

①→The price is a little more than 50 yuan. I can’t say more or less on this question. The reason is that it costs about 450 yuan to replace a motherboard with us. In fact, 500 yuan is about the same as here. too much.

How much does a Changhong 32 LCD TV circuit board cost?

The maintenance standard of 32-inch TV: 50 (door-to-door fee) 160 (maintenance fee) 160 (power board fee), totaling 370 yuan, but the price of power board may increase depending on the region

Novice help. How to distinguish the motherboards of Changhong LCD TVs?

LCD TVs seem to only have three-in-one motherboards, two-in-one boards and signal motherboards, and separate power board high-voltage pulleys and signal motherboards.

How long is the warranty for Changhong TV motherboards?

The Sharp I bought was less than two years old and it couldn’t be turned on. When I checked the motherboard was broken, I was told that the motherboard was not a core component and there was no three-year warranty;

State Administration of Quality Supervision, No. 20, 2011 Why don't you just use "logic board" instead of "logic component" in the announcement document? Looking at the relationship between the motherboard and the logic board from the perspective of LCD TV functions: the two are a logical whole, which convert external signals or network signals into digital logic and finally display them on the LCD screen. Without a motherboard, the overall logic function will be incomplete. To sum up, the motherboard should be a logic component covered by the national three-year warranty, and should have a three-year warranty period;

So the conclusion is that the quality of Sharp's color TVs is extremely poor!

How does Changhong TV determine whether the screen is broken or the motherboard is broken?

①. The general characteristics of screen damage are that there is a vertical line, a horizontal line, a bright spot on the screen, a color bar appears on the full screen but an image can be displayed on the top, there is no image on the left side of the screen and sometimes a color vertical bar appears, and a vertical bar appears on the screen. Bars and so on are all considered screen damage, but then again, the above: it is the last word to make accurate judgments based on reality.

②. Regarding motherboard damage, the characteristic is that the power indicator light comes on first when the power is turned on. As long as the power circuit is normal, the motherboard components are damaged. The screen failure may also be a motherboard failure, but it is more likely to be a logic board failure. This Mainly you have to judge based on the actual object, no image, no sound, motherboard problem, etc. There are many

Changhong TV motherboard broken symptoms?

1. Common faults include not booting, no image, no color, remote control failure, etc.

2. Unstable power supply, poor heat dissipation, design defects, and violent damage may be the reasons for the damage of the LCD TV motherboard.

3. If the LCD TV has been purchased for less than three years, you can contact the TV’s after-sales service for free warranty; if the LCD TV has been purchased for more than three years, the user can repair or replace the motherboard according to the If the cost of repair or replacement is not high, you can repair or replace the motherboard and continue to use it; if the cost is too high, you can consider eliminating the TV and buying a new model to replace it.

How much does a Changhong LCD 46-inch motherboard cost?

1 The price of Changhong 46-inch motherboard varies according to different models and quality. Generally speaking, it is expensive.

2 The main reason is that the TV motherboard is the core component of the TV. It needs to ensure its stability, reliability and performance, and needs to use high-quality materials and technology, so the price is relatively high.

3 In addition, with the continuous advancement of technology, motherboard accessories and technology are also constantly updated and iterated, requiring continuous investment in R&D and manufacturing costs, which is also one of the factors affecting the price.

In general, factors such as price and performance need to be comprehensively considered based on different needs.

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