1. Reconnect both ends of the HDMI cable.

2. Restart the TV and external devices.

3. Press the program source key of the TV remote controller to switch to the corresponding HDMI mode.

4. Replace the HDMI cable with another HDMI input port of the TV for confirmation.

5. If you have the conditions at home, you can connect the external device and HDMI cable to other TV sets for testing, and rule out whether it is an external device or an HDMI cable.

There is no signal when the HDMI hd cable is connected to the TV and computer. If the HDMI cable is confirmed to be ok, the setting method is incorrect.

1. Plug the data cable (VGA or HDMI) into a notebook or desktop computer and plug it into the corresponding interface of the TV.

2. The laptop or desktop computer is turned on, and the TV is turned on.

3. Select the signal source VGA or HDMI (according to the data cable) on the TV with the remote control panel.

4. Press Fn+ Projection key F5 on the desktop or notebook computer (for some computers, press F4 or F6).

5. Select Projection or Copy in the pop-up dialog box. (Projected as a picture displayed only on TV, copied as a picture displayed on desktop or notebook and TV).

6. After the TV screen appears, adjust the resolution of the computer with the mouse to the resolution suitable for the desktop monitor.

Tip: HDMI cable can transmit sound and video at the same time, and TV can bring sound display screen. On the other hand, if you use VGA cable, only the picture will be displayed on the TV, so you need to connect another speaker to the computer.

2.2. What is the reason why there is no signal when HDMI is connected to the TV?

The main reasons and solutions are as follows:

1. The TV signal source mode is not switched correctly, resulting in the mismatch between the signal source mode and the input signal source, and the TV will prompt that there is no signal; Solution: Press the signal source key of the remote controller to pop up the menu of the signal source, select HDMI mode, press Enter to switch, and there will be a computer screen after switching.

2. If there is still no picture of the computer after switching, it may be that the resolution of the computer is set too high, which exceeds the maximum resolution that the TV can support, so there is no signal. Solution: Set the resolution of the computer to the lowest, and then slowly increase the resolution after the TV shows the picture, so as to achieve the best picture effect.

3. If there is still no signal, it may be that the computer has not switched to projection mode. You can press the FN key and the projection key at the same time (there is a square screen pattern on the key) to solve it.

3. The computer screen shows that there is no signal in hdmi.

The monitor is connected to the HDMI interface. If there is no display, please follow the following steps to solve it:

1) Make sure that the monitor cable is intact.

Confirm that the HDMI cable is firmly connected, and replace the HDMI cable to confirm whether the monitor fault still exists.

2) Open the main chassis, confirm whether the fan of the discrete graphics card works normally, check whether the discrete graphics card comes out of the slot (except the integrated graphics card), then pull out the graphics card, wipe the metal antenna of the graphics card with a soft cloth and insert it into the slot to see if it is normal.

3) Pull the memory out of the memory slot, clean it with a soft cloth, and then insert it again. At this point, the general computer can be turned on normally.

4) If the above items can't solve the problem, please change a monitor and have a look. If the fault still exists after replacement, it is a problem with the graphics card hardware, and the graphics card needs to be repaired at this time.

4.HDMI no signal

Solution:

1. First, prepare HDMI hd line, which is divided into standard HDMI and micro HDMI. We usually use standard HDMI, and there is no difference between the two plugs on the line.

2. Take the computer as an example to connect the output source, and connect one end of the HDMI cable to the HDMI port of the computer.

3. The other end of HDMI is connected to the HDMI interface of TV.

4. Set the TV to HDMI mode through the remote control, and the TV will display the contents of the computer desktop by default.

5. If there is no signal display, first check whether the TV HDMI interface and the computer HDMI interface are normal, and then check whether the HDMI cable is intact. If you output through the HMDI port on the graphics card, you can unplug the cables of other interfaces first and try using the HDMI interface alone.

Matters needing attention

There is no fixing screw on the HDMI interface, so don't touch it hard when using it, otherwise it is easy to drop the line.

5. What if the computer HDMI is connected to the TV and there is no signal?

The specific steps to solve the problem of no signal in HDMI-connected TV are as follows:

1 There may be a problem. HDMI cable. At present, the highest version of HDMI 1.4 supports four functions (3D, Ethernet transmission, audio feedback and 2 160P resolution 4Kx2K). Not only is the broken wire version lower than 1.3, but the wire core is not the standard 19 wire core, which cuts corners. It is recommended to buy brand-name products Kaiboer.

2. Check whether the TV signal source selects HDMI.

3. Can the control panel driven by 3.NVIDIA graphics card recognize TV normally? If not, you can forcibly identify the TV.

4. Please note that HDMI is best not to be hot-plugged, and it should be plugged and unplugged when it is turned off.

5. The HDMI function of some desktop motherboards with integrated graphics cards may require the motherboard jumper setting (DVI HDMI mode switching).

6. Ensure that the graphics card driver is normal.

7. The TV interface may be inconsistent with the HDMI cable interface. At this time, you can try using the HDMI adapter.

8. It is recommended to use Win7 and above systems to support all HDMI functions. WinXP has come out, and it is not enough to face the new era.

6. How to solve the problem that hdmi has no signal source when the computer is connected to the TV?

1 There may be a problem. HDMI cable. At present, the highest version of HDMI 1.4 supports four functions (3D, Ethernet transmission, audio feedback and 2 160P resolution 4Kx2K). Not only is the broken wire version lower than 1.3, but the wire core is not the standard 19 wire core, which cuts corners. It is recommended to buy brand-name products Kaiboer.

2. Check whether the TV signal source selects HDMI.

3. Can the control panel driven by 3.NVIDIA graphics card recognize TV normally? If not, you can forcibly identify the TV.

4. Please note that HDMI is best not to be hot-plugged, and it should be plugged and unplugged when it is turned off.

5. The HDMI function of some desktop motherboards with integrated graphics cards may require the motherboard jumper setting (DVI HDMI mode switching).

6. Ensure that the graphics card driver is normal.

7. The TV interface may be inconsistent with the HDMI cable interface. At this time, you can try using the HDMI adapter.

8. It is recommended to use Win7 and above systems to support all HDMI functions. WinXP has come out, and it is not enough to face the new era.

How to connect a laptop to a TV:

Generally speaking, after most notebooks are connected before starting, Win7 will automatically connect to HDMI, which will be displayed as copy mode.

If it is not an automatic connection, you need one of the following manual setting methods:

According to your operating system, follow these steps to switch the video output to HDMI:

WinXP

Connect the HDMI cable to a computer and an output device, such as a TV.

On the computer, right-click the desktop and select Properties.

In the screen properties, click Settings. Here are two monitors listed. One is gray. Click this screen.

Allow this device to be set as the primary monitor.

Win Vista

Connect the HDMI cable to a computer and an output device, such as a TV.

On the computer, right-click the desktop and select Personalize. In the Control Panel, click Display Settings.

In the Display Settings window, click Settings. Here are two monitors listed. One is gray. Click this screen.

Enable this is my main monitor.

Win7

Connect the HDMI cable to a computer and an output device, such as a TV.

On the computer, right-click the desktop and select screen resolution.

If the two monitors are not listed, click Test to start testing the monitors again. One is gray. Click this screen.

Enable this is my main monitor.

If only one monitor receives the signal, right-click the desktop and select the screen resolution.

Select Copy these displays from the multi-display drop-down list:

Then your two monitors will show the same desktop. The maximum resolution of the desktop is limited by the maximum resolution supported by the monitor.

If you choose to expand these monitors, you can set the resolutions of the two monitors separately. In this mode, your two monitors will display different information. Drag a window out of the current desktop and you will see it appear on the second monitor.

Desktop in the first monitor and desktop in the second monitor:

Copy these monitors: Suitable for use when the highest resolution of TV is the same as that of hd projector and desktop monitors. For example, the monitor TV shit 1920* 1280 can be copied.

Expand these monitors: it is suitable for the connection between notebook and 1080p TV. When expanding, just drag the movie or slide to the second screen. If you want to display the same picture at the same time, the notebook can choose to copy these displays, but the resolution of the notebook can't reach 1080p.

If there is no sound, you can manually select the default sound device as the HDMI output:

Many TVs support 1920x 1080, but the resolution can only be set to 1366x768 when connecting to a computer, and point-to-point output of 1080p can be realized when connecting to wd tv.

The solution of HDMI connecting TV without signal is introduced in detail here. Don't worry if there is no signal on the HDMI-connected TV. To solve this problem, it is necessary to prescribe the right medicine. There are many reasons why there is no signal on the TV connected with HDMI.

7. Why is there no signal when the hdmi cable of the desktop computer is connected to the display screen?

Generally speaking, the problem may be like this: 1. Please ensure that only the HDMI cable on the graphics card interface is connected to your monitor. Pay attention to the HDMI interface on the graphics card mentioned here. Some motherboards also have an HDMI interface. If all are connected, there may be no signal.

2. Please ensure that the monitor is only connected to the HDMI signal of the computer. When the monitor is connected to multiple video signal sources at the same time, it may not be able to switch by itself and needs to be adjusted manually, so it is best to connect one directly. 3. Your HDMI cable specification version is too low.

Please ensure that the version of the HDMI cable is at least 1.4. The lower version of HDMI cable does not support the output of high refresh rate signals such as 2K and 4K or 120HZ.

4. There may be something wrong with the wire or interface of the graphics card, which can be verified by different computer experiments. 5. If your computer can't be turned on because of a fault, naturally there is no HDMI signal.

Please pay attention to check whether your computer really started successfully. (Judgment method: press the "Num" key on the keyboard continuously. If the Num power indicator of the keyboard can light up, it means that the startup is successful).

If the above methods still can't be solved, please further supplement the detailed information.

8. What if there is no signal on the computer HDMI?

The problem must be the drive.

I wonder if your driver upgrade program was originally designed for this type of motherboard. There are two other ways to try, one is to change the HDMI port, and the other is to select video on the TV remote control instead of the computer or VGA. This is the solution that there is no signal when I send Panasonic plasma.

VGA with signal is different from HDMI. It may be that the interface or graphics card is burned, the wires are easy to burn out, or there may be a problem. Please pay attention to HDMI, do not plug it in, and try to plug it in when it is turned off.

There may be something wrong with the HDMI cable. At present, the highest version of HDMI 1.4 supports four functions (3D, Ethernet transmission, audio return, 2 160P resolution 4kx2k). 2. The rotten shanzhai cable is not only lower than the version of 1.3, but also the core of the cable is not the standard 19, which is very serious. It is recommended to buy brand-name products Kaiboer.

Can the TV set be recognized normally in the control panel driven by the graphics card? If not, you can forcibly identify the TV. Please note that HDMI should not be hot-plugged, and it should be plugged and unplugged when it is turned off.

The HDMI function of some desktop integrated graphics cards needs to be turned on in the BIOS to take effect, and some also need the motherboard jumper setting (DVI HDMI mode switching). Make sure that the video card driver works properly.

The TV interface may be inconsistent with the HDMI cable interface. At this time, you can try using the HDMI adapter. It is recommended that Windows 7 64-bit and above systems support all HDMI functions and can automatically identify matching audio.

XP has come out, and it is not enough to face the new era. If an adapter is used, it may be an adapter.

9.HDMI suddenly has no signal output.

1, to ensure that the TV HD interface is selected correctly. Generally there are three interfaces on TV, HDMI 1/2/3. Plug in the power and choose on the TV.

2. Ensure the TV refresh frequency and resolution support. If the TV only supports 50HZ, the computer will be set to 50HZ. If Panasonic can choose 100HZ, it doesn't matter. If the TV resolution supports 1920* 1080, the computer settings can be ignored. If it is lower than this resolution, the number of computers supported by the TV will be set or set lower.

3. Make sure that the signal output mode of the computer is selected correctly. For example, WIN7 can be copied, expanded and separated by selecting signal output mode through Win+P.

4. Ensure that the computer graphics card driver is normal.

5. Ensure that all HDMI plugs are fully plugged in.

6. Turn on the TV before turning on the computer. Generally, the problem that some TVs can't receive HDMI signals can be solved by restarting the computer to avoid hot plugging as much as possible.

7. When some computers are connected to the TV with HDMI, it will happen that the computer can recognize the TV, but sometimes the TV can receive signals, and sometimes it can't. This kind of situation generally appears in systems above WIN7, and it will not appear in XP. If you don't want to use XP, you can select the signal output option in BIOS settings, and the default is HDMI. Because the motherboard settings generally identify VGA or AVI output first and then HDMI, systems above WIN7 will often get stuck in the identification stage, so there will be cases where TV can be identified but there is no signal on TV. How to set the default HDMI output can be Baidu, which will not be explained in detail here.