has many reasons for the screen not to boot. The common reason is that the virtual welding of memory or memory slots is not good, which is a problem with the motherboard power chip. BGA (north and south bridge, graphics card, network card, etc.) packaging chip virtual soldering will cause the startup screen to not be lit. It is recommended to send after-sales test and maintenance of the corresponding brand manufacturer;
computer is turned off abnormally or after a long time of use, it is turned on again, and suddenly it cannot be turned on, the screen display is not lit, and the power indicator can be simply troubleshooted. The reason;
The first step is to check the signal indicator light, first determine the actual boot. If the startup indicator light will flash, the black screen sometimes does not all black screens. Look carefully, it is a gray screen. When the signal light flashes, it indicates that there is no problem with the hardware. Reinstall the system and save it. As shown in the figure:
If the screen is completely black, press the power button indicator light without response. Only the power light indicates that the computer hardware is broken. Some may be the graphics card, or the motherboard is burned out, and the CPU may be broken. These faults need to be asked. Several professional repairs or in a safe situation, you can go to the computer repair center;
may also be damaged by the laptop cable, and it needs to be replaced as shown in the figure
Use an adapter power supply. Using other computer power supplies can make the laptop work, but the voltage is not an adapter, which can easily cause excessive current to damage the circuit; Input voltage: AC100-240V Output voltage: 19v-1.75a, output current: 3.25a
Of course, the reason for the laptop is not sure, but there are also bad habits. Find the root cause to prevent the computer from having the same problem next time;
Be careful to keep the computer usually, the computer needs to be turned off during thunderstorms, and electronic products are very easy to damage when working in thunder and lightning weather. When using thunder, there is no major damage. This is not advisable. For a long time, the computer has a fault, and even the standby state is not advisable.
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