The Spring Festival holiday has ended, some small partners will encounter the situation that the computer is not lit after returning to work, and then the author will share with you a few practical self-help methods.
Troubleshoot host power
Do not panic when the black screen of the computer is not lit, we must first confirm the situation of the power supply. Many users will power off the power before the holiday, and as a result, they will forget about the back of their heads after resuming work, and when they see the computer "black screen", they will rush to unpack the chassis, and finally they will often press the power button to solve the problem.
Monitor switches don't overlook
Of course, in addition to the host power to power, the display should not forget, think about whether they turned off the screen before the holiday, this is also the classic "black screen" oolong phenomenon, the author encountered a lot of "can not turn on the black screen" of the computer check to the end found that it is actually the monitor switch is not open.
After confirming that the power supply is normally powered on, the computer monitor is also open, if the screen is still black, you can find a few spare cables at this time to try the HDMI/DP cable and whether the power cord is damaged, confirm that there is no mistake and then open the chassis to check the internal hardware, and can solve the battle outside the chassis to solve the problem outside the chassis.
Plug and remove the memory repeatedly
Internal hardware we first start from the most problematic memory, when the resumption of work most of the users will clean the workstation, then it is easy to touch the chassis, memory is easy to be shaken and cause the contact to loosen and affect the boot.
The memory check can be repeatedly plugged and unplugged, and the motherboard with 4 slots can change the two-way memory to the other two slots to try, or use only 1 memory to check whether the computer can be lit.
Flexible use of self-test lights
There is a relatively simple way to confirm whether there is a memory problem is to see the motherboard fault detection lamp, most of the motherboards are currently with, which is an important part of the motherboard POST mechanism.
Motherboard fault detection light
There are 4 detection lights, namely CPU, DRAM, VGA and BOOT, normal boot these lights in turn, if there is a problem, the self-test lamp will be in the problem lamp is always on or looping. For example, the CPU lamp jumps to the DRAM after the normal should jump to the VGA, the problem encounters a re-self-test will jump back to the CPU, which means that there is no memory self-test, once or twice may be normal, if you jump back many times, that is the memory problem, then you have to try the re-plug memory we said above, the general CPU and DRAM are always on or the loop may be a memory problem.
The graphics card may also have problems
BOOT light is relatively rare, VGA is always on occasionally, corresponding to the graphics card, if you encounter the same as the memory, reseat the attempt, or check whether the monitor cable is plugged in.
Reset the BIOS Dafa
The last self-help method is to reset the BIOS, reset the BIOS is also as easy as the memory to solve the computer black screen method, most high-end motherboards in the I / O area has a reset button, click to reset the BIOS.
If there is no reset button in the I/O area, the more common way to reset the BIOS is to clip the motherboard battery, disconnect the power and wait for 30 seconds to 1 minute to reset, and then put the battery back.
After the BIOS reset, XMP and other overclocking settings will also return to the default, remember to go to the BIOS to turn it back on.
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