Re Fuse Power Supply

When your power supply dies, it can mean two things – either a fuse has been blown, or it has a loose wire. Power supply fuses are among the few components that can be serviced. Most fuses are soldered directly to the circuit board. Replacing a fuse would require you to remove the circuit board, unsoldering the old fuse, and soldering a new fuse in its place.
1. Unplug the Power Supply. Switch off the socket that is connected to the power supply. Unplug the line voltage power cord from the socket.
2. Open and Unplug the CPU: Use a torx screwdriver to remove the torx screws of the CPU. Remove the CPU casing. Unplug the low voltage cables that are connected to the drives and motherboard. Remove any CPU cards that may obstruct your view of the power supply.
3. Unscrew the Power Supply. Generally, the power supply is held in place by 4 torx screws. Unscrew them using the torx screwdriver and remove the power supply from the CPU.
4. Check the Warranty. The warranty is a stamped sticker that is on one of the edges of the power supply. It consists of the warranty date, a bar code and a ‘pass’ stamp. If the warranty has expired, cut across the sticker safety seal and open the power supply case.
5. Examine the Fuse. The fuse is usually located on one corner of the power supply. Use an ohm meter to check the fuse. If the ohm meter is showing readings below 0.1 ohms, or if there is resistance on the meter, then you will know that the fuse has blown.
6. Charge the Soldering Iron. Plug in the soldering iron and heat it to about 700 degrees. Touch the tip of the soldering iron to the tin wires on either side of the fuse. As the solder softens, gently push the fuse away from the circuit board. Once the soldering is complete, you can remove the fuse.
7. Solder New Pins to the New Fuse. Buff each end of the fuse with emery paper to dull the plating. Take the six inch long stripped 24 gauge wire with flux and tin it with resin solder. Tin the ends of the fuse, after which you can solder the wires to the ends.
8. Trim the Wires and Circuit Board Pins. Use the wire cutter to remove any excess pins from the board. Also, cut the gauge wire with only an inch of space from the fuse joint.
9. Solder the New Fuse. Place the new fuse onto the circuit board and solder it into place with the soldering iron. Once this has been completed, use the ohmmeter to test the fuse.
10. Reinstall the CPU. Once the fuse is showing good readings on the ohmmeter, close the power supply case. Keep it back into the CPU and screw it in. Replace the CPU casing and plug it in for use.

Install Computer’s Power Supply

Teach you how to replace your computer’s internal power supply component.

Step 1.Find the power supply.

This supplies power to the other components, which is why it has so many wires coming out of it. It is usually positioned at the back top corner of the computer case. The power supply has a fan built into it to keep itself and the computer cool.

Step 2.Get into the tower.

To get into the tower, you will have to remove the panel which is on the right hand side when viewing the tower from the back. Open this side of computer case by removing the screws at the back of the tower which are holding it in place. Then simply slide the panel off.

Step 3.Disconnect the power cables. 

Cable from the power supply should be connected to each component requiring power. These cables are easy to disconnect simply pull out the plugs from sockets on the back of the components. The plug and socket on the motherboard are a different shape from the normal type, but it should come out just as easily. It may be a good idea to write down how many sockets were disconnected so you can make sure they are all reconnected later with the new unit.

Step 4.Remove the power supply. 

Remove the screws at the back of the power supply unit while supporting it with one hand. Once the screws are undone it should be easy to slip the old unit out of the tower.

Step 5.Power cable connection.

Screw in new drive then connect the power cables to every component that was originally connected. Remember if any components are left unconnected they will not work.

Step 6.Get it going again. 

Switch the computer on, if all the components have been connected you should be ready to go.

Q&A

My PSU is on the top front of my case. Can you help me to remove it? It comes with a case so it’s generic?

Check for screws on the outside of the case, and inside of it. See where the PSU is being held into the case. I cannot help that much as I do not know what case you have.

Precautions for using the laptop battery

（1）Whether the new laptop battery needs to be activated

In fact, the activation of the battery in the factory should have been completed, the laptop battery shipped with a little power is to avoid the natural loss of damage to the battery. The activation of the battery should be carried out in the absence of protection circuit, the lithium battery itself with a protection circuit, the design of the circuit block is designed to avoid excessive charge and discharge of the battery, the general battery is fully charged, the charge indicator Out of the moment, the battery is not charging, then this time you plug in the charger then charging it does not make any sense. We can see from the status of the battery whether the battery is charging, there is a simple way to determine whether the battery is charging, the battery will emit a certain amount of heat when charging, when the battery is full after one hour (charger Power plug not unplugged), you go to touch the battery, this time you will find the battery is at normal temperature, it is because the battery is not charging at this time, of course, there will be no heat generated.

 （2）How to charge properly

Regardless of the notebook using lithium batteries or nickel-metal hydride batteries, these batteries have a memory effect, nickel-metal hydride batteries have a significant memory effect, lithium also memory effect, but its memory effect relative to NiMH smaller. We have heard of the so-called lithium battery has no memory effect, it is only some js exaggerated, the purpose is to guide consumers in the wrong. Since the battery lithium has a memory effect, then when charging should try to run out of electricity and then recharge, do not just want to go to recharge when charging, so although easy to use, but will shorten the battery life. However, we also have absolutely no need to wait for electricity to recharge completely, which is too troublesome. Although this battery is protected under the protection of the circuit will not not damage the battery, but there is nothing particularly necessary. In fact, when the charge is less than 3% of the charge on it, the memory effect is still an objective reality, but compared to the natural loss, it is nothing.

(3) the need to unplug the battery when using an external power supply

In fact, it depends on when you use an external power supply is not needed to charge the battery, the number of battery charging is directly related to the life, under normal circumstances, the number of lithium battery charge and discharge is fixed, the number of charges is generally only about 500 times, up to No more than 800 times. Each time we charge the battery, correspondingly, it reduces the number of recharging times. However, many notebook manufacturers have taken into account the vulnerability of the battery, an increase of the battery protection technology, does not meet certain conditions will not be charged. Even so, when you use the computer for a long time using an external power supply is also recommended that you unplug the battery, because high temperature is also one of the battery's nemesis, the laptop will produce a certain amount of heat when used, which is very harmful to the battery. Of course, if you are not sure about your own battery, I still recommend that you unplug your laptop battery and then use an external power supply.

How to buy a power supply

How to buy a power supply

      Power supply is an integral part of computer equipment and has a huge impact on your computer. It is considered the most valuable component of any device and the most important component that can cause it. This article tells you what you need to pay attention to when purchasing a power supply.

1.Determine the wattage you need.

Use a power supply calculator web page or software to help determine your requirements. Even better is to find a review of a similar system that measures power consumption. As that consumption is measured at the wall, multiply by the review system's power supplies efficiency to get the output. Don't purchase a power supply just above your requirements unless you plan not to upgrade the system. Purchase a power supply that will take you through your next few upgrades.

2.Determine the robustness of the power supply.

How well does the power supply handle changes in current? Although not a guarantee, there's a strong correlation between weight and quality: bigger components equate to a more tolerant, reliable power supply. If you don't care about noise, an 80mm cooling fan in the traditional place on the rear of the power supply may offer better value.

3.Research which connectors you need.

Higher-end models may only provide a 24-pin connector, and lower-end models may provide just a 20-pin connector. Typically, most Pentium 4 and Athlon 64 CPU-based motherboards will require a 20-pin ATX connector, while newer motherboards require a 24-pin ATX connector. Also, most power supply will have both a 4-pin and 8-pin auxiliary 12V connector for motherboards, and only high-end power supply will have one or more 6-pin PCI-E connectors for video cards.

4.Check the number of rails.

Just as your house's fuse box includes both a large main breaker and a smaller circuit breaker per circuit to ensure the smaller-branch circuit wires do not overheat, high-capacity power supply divide their output into multiple "rails," each with a smaller current limit. The relevant safety standard requires a 20A limit, which is quite generous, given that the wires are smaller than those used in your house to carry 15A. A cheaper alternative is to provide just enough rails to total the overall capacity, which makes it difficult to use all of a power supply's capacity.

5.Look for power supply with high-efficiency ratings.

And, ones rated under load temperatures, not room temperatures. Anything 80% and above is good. At 83%, approximately 17% of the wattage is lost as heat. Therefore, a power supply that may be advertised as a 500W power supply, will actually be drawing almost 600W at the wall. Efficiency drops over time and during the life of the power supply. A year-old power supply is most likely not capable of producing the same amount of energy it once did when it was new.

6.Get a modular power supply.

It will help eliminate extra wires to get in the way of cooling. Ignore the claims by PC Power & Cooling that modular cables create more resistance due to corrosion of contacts. The additional resistance is negligible.

7.Compare the amperage of each voltage.

A power supply wattage rating isn't conducive to determining amperage at any specific voltage. All power supply will have a sticker with their rated amperage at each voltage level. This information should be provided when purchasing a power supply from an online vendor and visible on the unit's retail box.

      Do not neglect the power of the importance of choosing a good power supply is one of the prerequisites for your more joyful work.