Changhong LCD TV has no sound LT19528 5

What you say is so general that no one can tell the real cause from this information. A few suggestions for you:If your TV is not out of warranty,Don't move it yourself,Call customer service for help。

However, the customer service came over and the maintenance personnel took two pictures for you to be OK, you must ask them to disassemble and repair the machine for you before letting them go, that 80% may be the speaker cable is not plugged in. If the TV has been used for a long time, the most likely situation is that the speaker is broken, disassemble the TV yourself to see the speaker model (how big?). How w?

How many ohms? How many pins are pins? What does the pin arrangement look like?

These have to be seen), and then go to the market to buy one and replace it, it's OK, there is not much money, half of the market price of the horn is enough for twenty or thirty. There are still many hidden dangers in the quality of Changhong's TV,The management is not very decent。 If you don't want to grunt, just find a place to repair the TV, and the money won't be expensive.

The panel is locked... There is no remote control...

Basically, there is no hope of solving it on your own.

Call the local help**, or repair customer service.

Call 12315 to complain about Changhong's quality problems. Do your best to make some junk products. What is this made by Samsung, which is **, the bad parts are not Changhong's, this TV is Changhong's, do you say there is such a manufacturer?

Hurry up and file a complaint! It's best to apply for a refund!

The main reasons and solutions for LCD TVs with no image and no sound:

1、There is no sound due to the volume setting of the TV,If you press the mute button to turn on the mute mode,Generally, you can press the volume + button of the remote control to increase the volume。

2. There is no sound due to the signal source input of the TV, for example, when the set-top box is connected, the connection line is wrong or there is no sound due to poor contact, you should check the connection of the copy line, reconnect and fix it.

3. There is no sound when there is a problem with the hardware of the TV, such as speaker failure, internal circuit failure, motherboard chip or other component failure, etc. It is recommended to contact the after-sales service of the TV for maintenance and solution. Raid.

Answer this problem of TV, if the remote control operation and switching are correct, then this fault is likely to be a problem with the sound amplifier circuit, check this problem as follows:

First of all, measure whether the voltage of each pin of the integrated circuit chip with sound amplifier is normal, if there is any abnormality, focus on checking the components around the abnormal pins of the chip, such as: input coupling capacitor to the chip, bypass filter capacitor, signal feedback capacitance, decoupling capacitor, bootstrap capacitor, chip transmission capacitor and so on.

There are several cases when there is an image but no sound on the TV:

1.The receiving system is selected incorrectly, our national TV system should be pal-d, if the TV mechanism is selected as pal-i, there will be no sound.

2.The TV is turned off, see if you choose to turn it off.

3.The TV has a headphone socket, and you often use headphones to listen to TV, resulting in poor contact of the headphone socket, you can plug in headphones to listen to it.

4.The TV horn is damaged.

5.There is a problem with the sound channel or amplifier circuit of the TV.

You need to open the TV case, overhaul it, if you don't have weak current skills, ask a professional to repair it.

Can you elaborate on questions 1 and 2?

1. Check whether there is a problem with the sound setting of the TV and the network TV set-top box, you can press the volume + button to increase the volume.

2. Check whether the connection cable between the set-top box and the TV is not in good contact or there is a problem with the connecting cable, you can change the connection cable and try to reconnect it.

3. It may also be that there is no sound due to a problem with the program source, and you can change it to other TV programs**Try it.

5. It may be a set-top box system problem, you can restart the set-top box to solve it, or consider resetting the system of the set-top box to solve it.

6. After trying the above methods, there is still no sound, it may be caused by the hardware failure of the set-top box or TV, such as the failure of the TV's speaker, the sound decoding circuit, or the sound signal transmission interface failure of the set-top box.

Summary. 1. If there is only some noise and no image after turning on the TV, this situation is likely to be a problem with the high-frequency head. According to the working principle of the TV, this reason leads to sound and no image, and the picture tube can display the machine setting menu, with a sound interface, and an external sound signal.

2. The second situation is that there is a normal TV program sound, but there is no picture. This shows that the high-frequency, mid-frequency and accompanying sound circuits are in normal working condition, and there is no line output circuit without short-circuit faults. If the screen can display the TV settings menu, then this problem is likely to be due to the separation of the accompanying sound to the video amp.

3. In other cases, the sound is normal, but there is no on-screen menu. In this way, you can turn on the brightness and contrast of the TV, pay attention to the condition of the screen, and then turn off the TV. If you see a flash of light on the screen with a slight discharge sound at the moment of turning it off, you can be sure that the picture tube is fine.

At this time, it is necessary to see whether the CRT filament is lit. 4. If it is a TV with remote control, it is also possible to lose the image due to the failure of the CPU chip, resulting in uncontrolled brightness.

Changhong LT42710FHD flat-screen TV boot with normal sound,But gray screen,No image? Why?

Dear, it is caused by these reasons.

1. If there is only some noise and no image after turning on the TV, this situation is likely to be a problem with the high-frequency head. According to the working principle of the TV, this reason leads to sound and no image, and the picture tube can display the machine setting menu, with a sound interface, and an external sound signal. 2. The second situation is that there is a normal TV program sound, but there is no picture.

This shows that the high-frequency, mid-frequency and accompanying sound circuits are in normal working condition, and there is no line output circuit without short-circuit faults. If the screen can display the TV settings menu, then this problem is likely to be due to the separation of the accompanying sound to the video amp. 3. In other cases, the sound is normal, but there is no on-screen menu.

In this way, you can turn on the brightness and contrast of the TV, pay attention to the condition of the screen, and then turn off the TV. If you see a flash of light on the screen with a slight discharge sound at the moment of turning it off, you can be sure that the picture tube is fine. At this time, it is necessary to see whether the CRT filament is lit.

4. If it is a TV with remote control, it is also possible to lose the image due to the failure of the CPU chip, resulting in uncontrolled brightness.

1.You can connect an interface by yourself, disconnect the speaker wire, and string an interface. 2.If there is a set-top box, there is an audio output port on the set-top box, connect it to the power amplifier, and then connect it to the speaker.

This requires someone who understands the circuit to help you bring the audio signal out and connect it to a socket. If your external speaker is an active speaker, it needs to be isolated from the input end of the volume control, if your external speaker is a passive speaker, it can be drawn directly from the speaker's interface, it's OK (you need to pay attention to the impedance matching problem, otherwise it will affect the normal operation of the TV power amplifier circuit), you can also contact the maintenance staff to help you solve it.

If there is an audio output port, connect it to the speaker by yourself.

The reason why the TV has no sound is that there is no sound

1. In the silent state, or the volume is very small.

2. The speaker wire is broken, or the horn is broken.

3. The output of the accompanying power amplifier is broken, or the power supply is faulty.

4. Playing in the accompaniment... Wait.

1.It may be that the load circuit is faulty, disconnect the load and connect to the 60W bulb to see if the 110V voltage can be output, if it can't output the spike spring source is faulty.

2.It may be that there is a fault in the line circuit or field circuit, if the power supply is normal, access the line circuit, and see if the electric pressure disappears or becomes low.

3.Check whether the CPHAI shield protection circuit is activated, or if the CPU boot circuit is not working.

The reason for this situation is that it may be the computer version of the damage to Shen Ling, in this case, his computer board must be replaced, and only in this way can the effect of Yan Xiaoshou be achieved.