Friends who use computers often may have encountered a problem, that is, there is nothing on the black screen when the computer is turned on. There are many reasons for this problem. Here are some solutions that I sorted out for your reference.
Check whether the VGA data cable socket is loose!
Many times, it is because the data cable between the computer host and the monitor is loose, and no signal is transmitted to the monitor
Then check whether the VGA connector at the monitor and the VGA connector at the host are loose.
Judge according to the previous startup inspection!
In the past, after power on, the motherboard generally gave a "beep" to indicate that the power on was successful and the post was completed.
If you hear the beep, it means that there is no problem with your motherboard!
And the display has no display! It is possible that the graphics card is loose and the independent graphics card may be damaged!
Solution: replace the graphics card, connect the VGA data cable to the replaced graphics card interface to see if it can be displayed.
If you don't hear the beep, it may be caused by poor contact between the memory module and CPU on your motherboard.
Solution: of course, after pulling it out, wipe the golden finger (the part in contact with the motherboard) with a rubber difference, and then plug it in again to see if the fault can be solved
PS: even if many computer motherboards are turned on normally, they will not have the prompt sound I said. Then this step can also be used to eliminate the fault as long as the fan turns on after the motherboard is turned on and the display has not received the signal.
There is a sound after power on, but the display has not responded, even the "no signal" prompt at the moment of power on!
In addition to the possibility that the VGA cable mentioned in the first step is loose, it is also possible that the monitor power cord, power supply or the circuit board in the monitor are damaged.
After replacing the power cord or power supply (the notebook has power supply) with the replacement method, see whether it can successfully display "no signal". If it still fails, it is very likely that the display will hang up!
If there is no sound after starting up, if your computer can start up normally without sound before starting up, and you now have a black screen without any prompt when switching on and off the display, as in step 3, it may be a problem with the power cord or power supply, which can only be eliminated by changing the power cord or power cord, If there is a prompt "no signal", it is still the problem of signal transmission between the motherboard and the display.