1, first check whether the external wiring of the computer is connected properly, then plug in all the wiring again to see if the fault is eliminated.
2. If the fault remains, open the main chassis to see if there are any redundant metal objects in the chassis, or if the motherboard is deformed and causes a short circuit, smell if there is a burning smell in the chassis, if there is a burnt chip on the motherboard, and if there is any damage to the capacitor around the CPU.
3. If not, clean up the dust on the motherboard, and then check whether the computer is normal.
maintain
Monitor protection should pay attention to the following points:
(1) to prevent current instability? .
(2) Prevent other electrical appliances from interfering with the display.
(3) When cleaning, wipe the monitor screen correctly. Don't spray liquid directly on the screen. Wipe with a soft cloth.