Computer motherboard light stays on

Repair of inverter black screen fault

The black screen fault during Yaskawa inverter maintenance is usually caused by damage to the inverter power supply voltage that is too high and internal short circuit of the IGBT Yes, replace it according to the IGBT model. If an internal short circuit of the IGBT is detected, first use a meter to test according to the IGBT circuit diagram, and then start the internal circuit of the module. After detection, the internal fuse fails to blow.

Yaskawa ga700 inverter black screen troubleshooting, after replacing 3 electronic components, the display shows that it starts normally.

Replace the contactor with a new one. When the inverter is powered on, there will normally be a sound of the contactor closing. If there is no such sound, the contactor may be broken. If there is no problem with the contactor, check whether there is a problem with the power module. If the high-voltage power supply LED of the inverter is on, it means that the high-voltage DC power supply is normal.

Why is the CPU light on the computer motherboard always on?

If the motherboard is broken, it will cause the CPU self-test light to stay on. The reasons are as follows: The CPU self-test light is always on, which means that the motherboard cannot be detected. The CPU and motherboard are broken, the motherboard cannot supply power, and the CPU self-test light is always on. The BIOS version is too old and does not recognize the new CPU, which will cause the CPU self-test light to stay on.

First check whether the connection cable between the monitor and the host is loose. If not, it may be a fault caused by poor hardware contact. Turn off the power, open the case, clean the dust, especially the dust from the CPU fan, and check whether the CPU fan rotates normally.

If the fault persists, the fault may be caused by computer hardware such as memory, graphics card, CPU, etc. Then use the plug-in method, swap method and other methods to check whether the memory, graphics card, CPU and other devices are normal. If there is any damaged equipment, replace the damaged equipment.

MSI b660m motherboard has a red light - it may be that the BIOS is not compatible with the CPU, or the pins under the CPU are bent, or the contacts underneath are blocked, or the motherboard pin seats have bent pins, or The CPU power supply is not plugged in properly. You can reinstall the CPU. First check whether the connection cable between the monitor and the host is loose.

The editor will teach you what to do if the red light on the motherboard is always on (the ASUS motherboard self-test turns on the yellow light)

The yellow light on the ASUS motherboard is always on, which means that the motherboard battery is insufficient. Problems require timely replacement of the motherboard, battery, and memory stick; poor connection between the main line at the back of the chassis and the monitor; the hard disk is damaged and data cannot be read; the display shows that the motherboard is wet; 5. The power-on button does not return.

Remove the battery from the motherboard and discharge it for 2 minutes, then plug it back into the power supply and put the battery back. Pull out the memory stick and wipe the gold finger with an eraser. And start the machine without memory, and then plug in the memory to start. Check the CPU power supply interface, unplug and connect the 4pin or 8pin interface, and test whether there is a virtual connection.

The heat dissipation is not good. The system overheats due to the influence of weather temperature or insufficient number of revolutions of the CPU fan, which may cause the computer to automatically shut down. It is recommended to check whether the system temperature is normal. Memory reasons.

What does the white light on the computer motherboard mean?

It is the troubleshooting light. The white light on the motherboard is caused by the following reasons: 1. First unplug the computer power cord and press the power button on the chassis 5-6 times. Release the residual charge from the motherboard. 2. Then open the side panel of the chassis and insert and remove the memory slots. 3. Remove the CMOS battery from the motherboard and reinstall it after 1 minute.

Check whether the graphics card is in poor contact, remove the graphics card, insert the gold finger, and clean the dust. Check whether the monitor graphics card cable is in poor contact. If you have discrete and integrated graphics cards, check whether the wrong graphics card is connected. Is the external power supply connected?

The constant white light on the computer host generally indicates that the computer power is turned on normally and the computer is running normally. This kind of lamp is commonly found in some brands of computers, such as Dell, HP, etc. For self-assembled computers, if there is this kind of light on the motherboard, it will also light up to indicate that the power supply is normal.

The white light on the ASUS motherboard is always on, which means the graphics card is detected abnormally. You can try to re-insert and unplug the graphics card.

For models with removable batteries, please use the battery or power adapter to power the notebook separately to see if it can boot normally. If the above method cannot solve your problem, it is initially determined that this situation may be due to hardware failure. It is recommended that you send the machine to a local service center for testing.

The white light on the ASUS motherboard is always on, which means the graphics card detects abnormally or does not support UEFI mode.

What should I do if the computer motherboard self-test light is on?

1. You can try to plug in the power cord first, then remove the graphics card and memory, wipe the connected parts, and then turn it on again. This usually solves the problem as long as it's not a motherboard issue. If it has no impact on the computer or occurs occasionally, don't worry about it. It will disappear automatically after restarting the computer.

2. For example, the BIOS is not compatible with the CPU, or the pins under the CPU are bent, or the contacts underneath are blocked, or the motherboard pin sockets have bent pins, or the CPU power supply is not plugged in properly. You can reinstall the CPU or try another one.

3. Plug in the data cable between the monitor and the graphics card. If it still doesn't work, consider the graphics card is damaged and replace it with a new one. If the monitor is not powered on (the indicator light does not light up), look at the back of the monitor, plug the power cord connected to the monitor upwards, and check whether there is power from the other end of the power cord to the socket.

4. If the self-test light is normal after restarting, it is due to a recognition error during the computer's power-on self-test, which is caused by interference from some software. In order to solve this problem, you can try to re-plug the memory module, replace the hard disk and other hardware, update the system and software drivers and other measures.

5. First unplug the computer power cord and press the power button on the chassis 5-6 times. Release the residual charge from the motherboard. 2. Then open the side panel of the chassis and insert and remove the memory slots.

Why is the computer motherboard light on?

First check whether the connection cable between the monitor and the host is loose. If it doesn't work, the fault may be caused by poor hardware contact. Turn off the power, open the case, clean the dust, especially the dust from the CPU fan, and check whether the CPU fan rotates normally.

Best Answer The motherboard boot light may be on for the following reasons: whether the power button is connected incorrectly. The IO area of ​​the chassis, that is, when booting and restarting, is connected to the motherboard with a jumper. Check whether it is connected incorrectly. Use a screwdriver to short-circuit the motherboard startup key pins. If the computer can start, there is something wrong with the startup key.

Power supply problem Power supply problem is one of the common reasons why the motherboard CPU light turns red. If the power supply is insufficient or malfunctioning, other components of the computer system may not function properly, and therefore, the lighting of other computer parts may also have problems.

The red light on the motherboard is always on. There may be a problem with the CUP. For example, the BIOS is not compatible with the CPU, or the pins under the CPU are bent, or the contacts underneath are blocked, or the motherboard pin sockets have bent pins, or the CPU power supply is not plugged in properly. You can reinstall the CPU or replace it with another one. try.

The white light on the motherboard is due to the following reasons: 1. First unplug the computer power cord and press the power button on the chassis 5-6 times. Release the residual charge from the motherboard. 2. Then open the side panel of the chassis and insert and remove the memory slots. 3. Remove the CMOS battery from the motherboard and reinstall it after 1 minute.

Analysis: The fan rotates to indicate that the power supply has started, but there is no image on the monitor. The computer cannot enter the normal working state, indicating that the computer has not passed the system self-test, and the motherboard BIOS settings have not been output to the monitor. The fault should be in the motherboard. On the graphics card and memory. But sometimes inferior power supply and damaged display can also cause this fault.

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