Yesterday was fine, but today the display is not lit

Plug and unplug all the cables, especially the data cable of the hard drive, the cable is not loose? Most of them are because the cable is loose, as well as the memory, and the graphics card is plugged and unplugged again. If it really doesn't, there is a high possibility of a problem with the hard disk, not necessarily broken, but an illegal shutdown that causes an error in reading the hard disk, and it will also cause a problem with the boot, and the display does not light up not because there is a problem with the display or graphics card, but when the machine runs to read the hardware, it will not be able to continue.

Repeat the power on/off try, it really doesn't work, just plug in a system disk, and pull out the other disks.

It's useless for you to ask me, or you have to go to the mobile phone store to see that eighty percent of the motherboard or screen is a problem.

Maybe the screen is black, or you can just change it when the power is off.

Take a look at the mobile phone store, maybe there is a problem with the motherboard.

You must have bought a reprint.

The phone battery is already broken if it doesn't save power.

Black screenNo signal, no signal input. The specific solution to the black screen of the display without signal is as follows:

1.If there is a problem with the monitor, first power on the computer monitor separately to see if the light of the monitor can be lit normally, and replace it in time if the monitor is damaged.

2.If there is a problem with the connection cable, check whether there is a problem with the connection cable between the computer and the monitor, and see if there are problems such as loose materials or poor contact. You can replug the cable or replace it to see if that solves the problem.

3.Memory sticks.

Q, If the memory module is poorly touched or damaged and the computer monitor cannot be displayed, you can unplug the memory module and wipe the gold finger.

Then reinsert the attempt to resolve the issue.

It may be that the driver board is faulty; There is a problem with the signal processing, and part of the circuit has been damaged; There is a problem with the power cord, and there is a problem with the power cord of the driver board; The MCU is faulty and so on. It is necessary to find out the cause before you can solve the problem.

Reasons why the display does not light up and how to repair it:

The display is powered on and there is no display, which is a relatively simple fault. The power supply of the LCD screen is relatively simple, and the internal components are also relatively simple.

If the driver board is faulty, you need to find a driver board of the same model as the original driver board and replace it.

There is a problem with the signal processing of the display screen, the display screen can not display the picture, this is because of the damage to the internal circuit of the display screen, the display load increases, with the decrease of voltage, the internal parts of the display will be gradually damaged, replace the damaged components, and the display screen voltage can be restored to normal;

Whether the power connection is normal and whether the power cord is faulty. Generally speaking, as long as the display is powered on, the picture can be displayed, if the display screen does not light up after connecting the power supply, you can directly replace the power cord;

MCU failure is very easy to cause display failure, one is the internal program of the MCU is damaged, and the other is the MCU itself is damaged. When there is a problem with the MCU, you need to contact a professional to solve it.

Pro, the lack of light may be due to the computer itself not starting normally, or the power of the monitor is not turned on, check whether it is caused by the failure of the ** cable, try to change it; It is also possible that the monitor is damaged, which can only be repaired or replaced. Reasons are as follows: 1. Check whether the power supply of the monitor is turned on, or that the power cord is connected normally; Then check whether the connection between the ** cable of the host and the top of the display is normal; 2. Check whether the host is turned on normally, whether the status of the front panel of the chassis is turned on, whether the indicator light on the keyboard is on, etc.; 3. Change a ** signal line, or change a display to eliminate whether it is a monitor or a ** line; 4. If the host is not turned on normally, after eliminating the power supply problem, try to check whether the memory is plugged in tightly, generally after the chassis is moved, the memory may become loose and cause a boot failure, or blow the dust near the memory slot first, and then wipe the gold finger of the memory with an eraser after cleaning it up; It is also possible that the discrete graphics card is faulty, you can unplug the ** cable from the discrete graphics card, check if the motherboard has the ** output port, plug it in and try it; 5. If the display is broken, the display can only be repaired or replaced with a new one;

You still need to replace the cable or replace the monitor to try, if the replacement display is not lit, it may be a problem with the host.