Check steps:
Step 1: First check whether the external wiring of the computer is connected properly, and connect each connection Plug the cable in again to see if the fault is eliminated.
Step 2: If the fault persists, then open the main case and check if there are any excess metal objects in the case or a short circuit caused by the deformation of the main board. Smell whether there is a burning smell in the case and whether there are any traces on the main board. Burnt chips, whether the capacitors around the CPU are damaged, etc.
Step 3: If not, then clean the dust on the motherboard and check whether the computer is normal.
Step 4: If the fault persists, unplug the Reset line and other switch and indicator light connections on the motherboard, and then use a screwdriver to short-circuit the switch to see if it can be turned on.
Step 5: If the computer cannot be turned on, then use the minimal system method to unplug the data cables of the hard disk, floppy drive, and optical drive, and then check whether the computer can be turned on. If a startup screen appears on the computer monitor, the problem is among these devices. Then connect more than one device to the computer one by one. When a certain device is connected, the fault reappears, indicating that the fault is caused by this device. Finally, focus on checking this device.
Related recommendations: "FAQ"
Step 6: If the fault persists, the fault may be caused by memory, graphics card, CPU, motherboard and other equipment. Then use the plug-in method, swap method and other methods to check whether the memory, graphics card, CPU and other devices are normal. If there is any damaged equipment, replace the damaged equipment.
Step 7: If the memory, graphics card, CPU and other devices are normal, then discharge the BIOS, use the isolation method, place the motherboard outside the chassis, and connect the memory, graphics card, CPU, etc. for testing. If the computer can is displayed, then install the motherboard into the chassis and test until the cause of the fault is found. If the fault persists, the motherboard needs to be returned to the manufacturer for repair.
Step 8: There is no display but an alarm sounds when the computer is turned on. When the computer is turned on, the system BIOS starts POST (power-on self-test). When a fatal error is detected in a device in the computer, The control speaker will sound an error report. Therefore, there may be a problem that there is no display and alarm sound when the power is turned on. For problems with no display and alarm sound when the computer is turned on, you can check the faulty device according to the meaning of the BIOS alarm sound to eliminate the fault.
Computer maintenance tips:
Keep the room where the computer is placed dry and clean, especially the computer workbench every day (or two or three days, depending on the cleanliness of the room) (Defined) Dust removal. You know, the monitor is a very powerful "vacuum cleaner". We have encountered accidents in the past where due to poor environment, thick accumulation of dust inside the monitor, and when the weather changed, the circuit board short-circuited and ignited, damaging the monitor.
Correctly boot up (peripheral first, then host) and shut down. In fact, this should not be regarded as maintenance content, but many users always disagree with it, and even mistakenly believe that today's computers even have "soft shutdown" and it is "commonplace". But this is absolutely necessary: if the order of "peripheral first, then host" is reversed, the system may not be able to recognize the relevant hardware, or the device driver may not be loaded.
Be sure to anti-virus before using a CD or floppy disk; you should also check for viruses after installation or use, because some anti-virus software is powerless against viruses in compressed files.
The above is the detailed content of What to do if the computer host is powered off and restarted indefinitely. For more information, please follow other related articles on the PHP Chinese website!