1. Usually, when the computer is turned on, the first thing is to perform the equipment self-check. If the card screen is in the LOGO picture of the motherboard, in most cases, the hard disk detection has not passed. You can try to replace the data cable for the hard disk. If there is no cable, you can also try to switch the two ends of the data cable and change the interface on the motherboard.

2. There is an error in the motherboard BIOS, and some motherboards have anti-intrusion mechanisms. If the accessories have been changed recently, it may also be caused by an error in the motherboard BIOS. The solution is to press the DEL key, enter the motherboard BIOS, initialize the BIOS setting information, and then press F1 to save, exit and restart the computer.

3. Check whether the machine is connected with external devices. External devices such as USB flash drive and mobile hard disk may be plugged into the USB port of the computer and forgotten to be unplugged, resulting in the failure of the motherboard self-test card owner. The solution is to unplug the extra external devices and restart the computer.

4. check whether the keyboard and mouse are connected backwards. This refers to the keyboard and mouse with PS/2 interface. Many people are careless and insert the interface of the keyboard and mouse backwards, resulting in the self-test error of the boot computer and even the screen is stuck. The solution is to turn off the computer first and then take over the keyboard and mouse again. Usually, the purple interface is the keyboard and the green interface is the mouse.

5. Back to the second point, it is still a hardware failure. If the hard disk is still invalid after replacing the data cable, you can try to unplug the data cable of the hard disk first, and then start the test. See if it will still be stuck in the LOGO screen here. If not, it is estimated that the hard disk is faulty. The only solution is to replace the hard disk.