The computer host does not turn on the red light

The red light of the computer host is not lit and cannot be turned on: if the hard disk indicator light is not on, and the hard disk does not turn after the motherboard is powered on, it is the power cord of the hard disk, and the data cable is not connected properly. If you don't hear a drop during the POST, it's likely that the motherboard is broken.

If the boot self-test is normal, it just won't be displayed, just unplug the memory and wipe the gold finger with hard paper.

Put it on again and try it on. This answer is for the Lenovo Xiaoxin Pro 13

Lenovo Legion Y7000P 2020 brand computer models.

Desktop computers have a slightly higher failure rate than laptops. But there are many faults in fact, we can solve them by ourselves as long as we have a little hands-on ability, and we can solve them by ourselves not only to save maintenance costs, but also to save time, and to learn to deal with the knowledge of similar faults, which is really a few in one fell swoop. 1. The indicator light of the display is not lit.

Note that the color and status of the indicator light are different for different displays, and the indicator light is generally solid green under normal conditions, and some are solid red light. However, if the main unit is not working, the display indicator may be orange, red, or flashing regularly. Regardless of the state, the light must be on when the monitor is turned on to be normal.

If it doesn't light up, check it as follows:

1. Whether you forgot to press the display switch - turn on the power switch.

2. Whether the power cord of the monitor is not plugged in properly - plug it back in. Note that both ends of the power cord must be checked, the most common is that the power interface of the display is not plugged in tightly, just plug it in tightly. Also, check to see if the power socket is loose.

If the above two items are still not lit after checking, it is mostly because the display is broken, and you can find someone to repair it.

2. The indicator light of the host is not on, and there is no sound after turning on.

After the host is turned on, there is a green power indicator that will always be on, and very few are red. If the indicator light does not turn on after turning on, and there is no whining fan turning sound (if there is any light on or the sound of the fan turning, turn to the third step), check as follows:

1. The two ends of the power cord of the host are not plugged in - recheck that the two ends of the power cord are plugged in tightly.

2. The host switch is stuck and doesn't pop up after pressing it - use a gadget to get the stuck power button out, and find someone to replace it later.

3. The power switch of the host is broken - find someone to repair and replace it.

4. The power supply in the motherboard or host is broken - find someone to repair and replace it.

3. The indicator lights of the monitor and the host are both on, but the display screen is black and there is no display.

If the monitor does not display, it may be that the monitor is broken, or the host unit may not be working properly. The judgment is as follows:

1. Judge whether the display is normal - reopen the display (the host can be turned on or not), if there is a display brand logo letter or a red, green and blue color pattern on the screen at the moment when the monitor is turned on, it will disappear after a few seconds, the display is normal, and the faulty parts are in the host;

2. Judge whether the VGA cable and the independent graphics card are normal - reopen the host, immediately observe the keyboard while turning on the host, after about 1 to 3 seconds of booting, if the three indicators in the upper right corner of the keyboard can be turned on and off at the same time, or after about 30 seconds of booting, press the "numlock" key on the upper right of the keyboard several times, and at the same time observe whether the digital function indicator at the top right of the keyboard can be turned on and off.

In short, if any of the three lamps changes, there are only two faulty parts: one is that the VGA cable is not connected properly, check both ends of the VGA cable and plug it back in. Second, if the host is equipped with a discrete graphics card, it may be caused by a faulty or poor contact of the discrete graphics card.

First check if there is a problem with the fan, and then check if there is a problem with the circuit of the motherboard; Most of them are burned by the motherboard or power supply!

Answer: Hello, the computer host lights up red because the key components of the system have gone wrong, causing the computer to enter the warning mode. You can fix the system error by restoring the operating system and get the console back to normal:

2. Then, the computer will prompt the user whether to continue to restore the drive letter, and select Yes to continue. Note that all files in the drive letter where the Windows system is located will be lost after clicking Continue, so before that, make a backup of your data to avoid unnecessary loss

3. After that, the computer will automatically enter the restore program, and restart the computer, in the process of computer startup, select the sysceo recovery option to enter:

The question screen won't open.

Hello, okay please wait.

Press the power button to turn on and off repeatedly, and try to try it for a while, but you really can't reinstall the system.

Unplug the power supply of the main machine, pick up the chassis, press the power switch, and press a few more times to install the power supply and turn it on.

Is the problem solved?

I had the same problem as you last night! Last night was also thunderstorming, the computer crashed, and the motherboard could not self-test after restarting.

Later, I took out all the memory modules.

After replugging it in, it can turn on normally.

I don't know if you have two memory sticks installed.

Take them all out first.

Only one is installed to boot up.

No problem, I put the second one on when I turn it off!

This type of problem has occurred with many computers.

The reason is all caused by thunder.

This is the motherboard north and south bridge heartpiece burned.

Solution. Change the motherboard.