1. Turn on the power of the computer and the computer does not respond: 1. Check whether the power socket has power and is normally connected to the computer; 2. Check whether the computer power supply can work normally (whether the power fan rotates after turning on), and whether the display is connected to the host normally; 3. Open the case cover to check whether the power supply is connected to the computer baseplate or motherboard normally, whether the plug between the baseplate and the motherboard is loose, whether the boot baseplate or motherboard is powered on, and whether the ATX power supply is wired incorrectly; 4. Unplug the memory module and turn on whether it will alarm; 5. Replace the CPU or motherboard.
Second, the power indicator on the bottom plate after powering on will be extinguished when it is lit up, and it cannot be powered on. The first thing to see if there are foreign objects such as screws in the chassis, resulting in a short circuit. Secondly, check whether the power cord is reversed, resulting in a short circuit to ground. Use the replacement method again to replace the power supply, motherboard, backplane, and other devices.
3. After the industrial computer is powered on, the power supply is working normally, and the motherboard does not have any reflection? First of all, remove the peripheral plug-in card and connected equipment to see if it can be activated? If not, you can remove the memory and see if it alarms? Then check the CPU's job, is it normal? Finally, replace the motherboard and check whether the motherboard is normal.
4. After booting, I hear the self-test sound of the motherboard but there is no display on the display: 1. Check whether the display is connected to the host normally; 2. Insert another display card to check whether it can be displayed normally; 3. Clear the CMOS (there may be an error in the setting) or replace the BIOS; 4. Replace the CPU board (motherboard integrated graphics card) or display. 5. There is no display on the alarm display after starting: 1. Open the case cover to check whether the memory module is loose or loose;
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