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What are the maintenance precautions for the computer mainframe?

First, start up regularly, especially in the wet season, otherwise the chassis will be short-circuited due to moisture, and the computer often used is not easy to break. However, if there is no lightning rod around the home, do not open the computer while thundering, and remove all the plugs.

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

Third, when you don't need a computer, you should cover the monitor, the chassis, and the keyboard with a breathable and cloakable cloth, which can prevent dust from entering the computer.

Fourth, try not to turn the machine on and off frequently. When not in use, simply use screen saver or hibernate. Do not move the computer while the computer is in use, do not let the computer be shaken, and do not plug in all the hardware devices in the power-on state, except for USB devices.

Fifth, use the power socket with overload protection and three pins, which can effectively reduce static electricity. If the hand can feel static electricity, use a wire with an enameled wire (that is, plastic outside, which is copper wire inside), and one end is wrapped around the rear panel of the chassis. On the top, it can be wrapped around the fan air outlet, and the other end is preferably wrapped around the water pipe. If you can't touch the water pipe, look around, as long as the metal object can touch the earth (soil).

Sixth, develop good operating habits, try to reduce the number of loading and unloading software.

Seven, follow the strict sequence of power on and off, should first open peripherals, such as monitors, speakers, printers, scanners, etc., and finally open the chassis power. On the contrary, you should turn off the power of the chassis first. (Currently most computer systems can automatically power off the chassis)

Eight, do not place speakers around the display, there will be magnetic interference. The darker the brightness of the display during use, the better, but the comfort of the eyes is better.

Nine, do not place water or liquid materials around the computer to avoid accidentally knocking over the inflow causing trouble.

Ten, the numerous lines behind the chassis should be straightened out, do not entangle each other, it is best to use plastic hoops or rubber bands to tighten, the advantage of this is that it is clean and not dusty, the line is easy to find, there are small animals in the family. Avoid being destroyed.

Eleven, every six months, a large-scale cleaning of the computer, thoroughly remove the internal dirt and dust, especially the chassis, but under the premise of certainty, if you are not familiar with the hardware, it is still rare.

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How to Test a Power Supply

A failing power supply can be the source of many computer crashes. It can also result in hardware that operates poorly or not at all. A failure to recognize the real problem means hardware is often replaced rather than the power supply itself. Testing your Dell power supply to see whether it still works is a simple process that you can accomplish with a paper clip. When a paper clip is connected to the green (signaling) wire and a black (ground) wire, it completes a self-test circuit that will turn the power supply on if it passes the test or prevent the power supply from turning on in the event of a failure.

Step 1

Unfold the paper clip into the shape of a "U."

Step 2

Remove the Dell's side access panel. This may require the removal of one or more thumbscrews on the rear face of the computer's case.

Step 3

Disconnect the main motherboard connector of the power supply from the motherboard. This will be a 20- or 24-pin rectangular connector. This connector is the largest coming from the power supply and is connected to the motherboard just to the right of the computer's central processing unit.

Step 4

Locate the pin on this connector that is connected to a green wire. There is only one, and it lies between two connectors attached to black wires.

Step 5

Insert one end of the paper clip into the green wire's connective socket.

Step 6

Insert the other end of the paper clip into either one of the black wire sockets located directly next to the green wire.

Step 7

Plug in the power supply and press its external or main power switch to the "On" or "Closed" position.

Step 8

Listen to the power supply. If the fans turn on within the power supply, it has passed all self-diagnostic tests and is still working.