chenlugb (Contact TA on the site) Generally speaking, if the machine does not respond after powering on, the display shows a yellow light, the power light flashes, and there is no normal or abnormal alarm sound from the chassis, it may be the motherboard. Fault. You can remove the motherboard power supply, and then short-circuit the fourth wire on both sides of the power port (that is, the fourth green wire from the left, and then replace the fourth black wire from the right) to power up the power supply , if the fan of the power supply rotates, it can be judged that the motherboard is faulty; if it does not rotate, it is a power supply fault. \x0d\ Kagome (contact TA on the site) There is no display after booting the computer. If other components are normal, the graphics card may be broken. If it is a discrete graphics card, try changing it to a better graphics card. If it still doesn't work, the graphics card slot on the motherboard is broken. If it is an integrated graphics card, you can only replace the motherboard. (Contact TA on the site.) If the self-test passes, it is not a motherboard problem. \x0d\If the self-test fails, see if it starts to detect the memory, hard disk, and optical drive; if one of the three key hardware mentioned above fails, it may not be a motherboard problem, but it may be that one of them is not passed. Pass the detected hardware or the next detected hardware. \x0d\If the graphics card does not start to be detected, it may be a graphics card problem or a motherboard problem. \x0d\The boot detection sequence is: motherboard (characterized by a beep), graphics card, memory, hard disk or optical drive (check which interface is on the first port, usually the hard disk) 1231boy (contact TA on the site) to see if the monitor is plugged in properly . Maybe the one behind the chassis is loose first. I've tried this before. chenjin827 (contact TA on the site) This is not a problem with the motherboard. If it is a dual memory block, one of the memory modules may be broken. \x0d\The symptom of a broken motherboard is that there is no response when you click on it. Growingpains (contact TA on the site) is normal There are two situations, motherboard or CPU, but the motherboard is more likely! \x0d\Listen to see if there is any hardware detection sound when you turn on the computer. If so, it may be a problem with the graphics card. \x0d\If it is a memory or hard disk problem, the black screen with white text can be displayed at the beginning, that is, the monitor can be lit! arelen (contact TA on the site): D, my host has broken down twice, and the other hardware was in good condition, but there was no response when I turned it on chen_shaoyun (contact TA on the site) Check if the power supply on the motherboard has exploded