The specific opinions are as follows:
First, check all cables that need to be used, including the power plug, to see if there is any problem, and ensure that all equipment is connected correctly and firmly and is in a power supply state. ?
Next, check whether the power supply is turned on. Listen to the sound of the power fan to see if the hard disk is working properly. If you don't hear anything, the power supply may be insufficient and you may need to replace the power supply equipment. To prove this, we can consider using power test equipment, such as PC power supply and cooling, to test the power output.
If the power supply is normal, but the screen is still black, try connecting another monitor to the computer to make sure it is not the monitor. If the monitor is working properly, replace the video cable. If the hard disk can still work normally at this time, and there is still no image on the display, it is likely that there is something wrong with the graphics card. To replace the new motherboard, or use the integrated graphics card of the motherboard.
If the motherboard has this function. Open the chassis, and check whether all the fans work normally after starting. The computer may also encounter overheating problems.
If your monitor is working properly, but the hard disk does not boot and there is no image on the display, please consider resetting CMOS. Turn off the computer, unplug the power supply, and then put on anti-static protective gloves. , and remove the battery from the motherboard. Then wait about five minutes, and then reset the CMOS settings. Finally, after the setup is successful, restart the computer to see if the problem has been solved.