What should I do if the computer host light doesn't work and I can't start it?

The reason why the computer host can't start even when the lights are turned off and the solution;

1. There is something wrong with the power key itself. Lead to poor power contact, so there is no response when pressed. This reason is very common, and the solution is to decisively replace the host button, or replace the button connection line of the on-off button and the restart button.

2. There is something wrong with the filter capacitor of the host power supply. When these two large capacitors burst or liquid appears, causing power supply problems, there will be a phenomenon that the power button is pressed but there is no response. Solution: Replace the filter capacitor of the host power supply.

3. The gold finger of the memory or graphics card (that is, the metal part at the bottom) is oxidized. Poor contact between memory and memory slot, poor contact between graphics card and graphics card slot, hardware incompatibility, and computer failure to boot.

First cut off the power, open the chassis, pull out the memory stick, rub the eraser against the golden finger (the metal part at the bottom) several times, and then insert the memory stick back. If you have a discrete graphics card, you can also handle it according to the above method and plug it back, but you can't change the slot.

Computer use and maintenance:

1, turn on the computer regularly, especially in the wet season, otherwise the chassis will be short-circuited when it is wet, and the frequently used computer will not break down easily. But if there is no lightning rod around the house, don't turn on the computer when it thunders and unplug all the plugs.

2. Pay attention to heat dissipation in summer, avoid using the computer for a long time in a room without air conditioning, and pay attention to antifreeze in winter. Computers are actually afraid of cold.

3. When not in use, cover the monitor, case and keyboard with a breathable and strong covering cloth to prevent dust from entering the computer.

4. Try not to switch the machine on and off frequently. When not in use, just use the screen to protect or hibernate. When using the computer, don't move the chassis, don't let the computer shake, and don't plug in all powered hardware devices except USB devices when booting.

5. Using a three-pin power socket with overload protection can effectively reduce static electricity. If the hand can feel static electricity, use enameled wire (that is, the kind with plastic outside and copper wire inside).

One end is wound on the back plate of the chassis, which can be wound on the fan outlet, and the other end is preferably wound on the tap water pipe. If you can't touch the water pipe, look for it nearby, as long as the metal object can touch the soil.

6. Develop good operating habits and minimize the times of installing and uninstalling software.