Sooner or later, but everything in our life comes to an end one day, and can be damaged anything.And suddenly completely.Therefore it is not surprising that one (or not) the day we turn on the computer flimsy, suddenly hear the familiar sound of the running cooler.A very unusual and unpleasant sensation.What is the problem?If you think well, the deductive method can come to the conclusion that if an electrical appliance is not included, which means that it does not come to power.Logically?Or this embodiment: the current is not supplied to the power supply, either with the same current block simply can not enter the system.What to do and how to be?How to check the power supply to the operation?
clear that the aforesaid unit is responsible for the fact that powers the computer.If it is blown or otherwise faulty, you can expect failure and other elements of the internal "stuffing."Therefore, with great responsibility you need to approach the selection of a reliable and powerful "nutritious" element.How to check the power supply computer yourself?Several ways.Here is one of them, and do you need the following: try to block the consistent inclusion of the network at the same time using the most common incandescent bulbs up to 40 watts of power.So it will be reduced to a minimum the likelihood that there will be a short circuit, in which case the lamp will light up in full glow.
How to check the PC's power supply anyway?Another way is to use a voltmeter.To do this, include the unit in the network and measure the voltage at the 9th contact socket motherboard.Experts call it "standby power".Ideally, the voltage should be about 5 volts.If it corresponds to this parameter, then there is no fear and bravely to connect the unit.
But the test does not end it yet.It is important to know how to check your computer's power supply at the time of its full load.For this purpose it is possible to resort to so-called pull-up resistors.They allow you to determine the reliability of the unit with a sufficiently high degree of probability.Experts recommend choosing resistor whose power is 20-25 watts.They are ideal to check most of the models of blocks, located in the middle price range.
So how to check your computer power supply using the pull-up resistors?They need to connect to the unit and then measure the load, always paying attention to the rules that are valid and are listed in the data sheet of the appliance.If the results you got, they match, it means that the unit can be completely trusted.If the figures are higher than those specified in the data sheet, then the unit may be not only fragile but also dangerous to use.
Now you know how to check the power supply of the computer.There is another method that can help in this situation.Disconnect all power from the graphics card, motherboard, hard drive, etc.(you can leave the DVD drive, it is not very afraid of voltage fluctuations).Next you need to take the train of the main power supply for the motherboard and short out its black and green connectors using an ordinary paper clip (straightened).Take the tester.The power supply, connect to a network first, and then turn on with a switch.Once it starts, the black lead of the tester to be inserted in any of the power wires in black and red alternately in the remaining paste, colored pins.Now the parameters that appear on the screen of your tester, check the following parameters (these are the numbers you need to see):
- orange - 3.3 V;
- White - 5V;
- red - 5V;
- yellow - 12V;
- pink (or purple) - 5V;
- blue - 12V.
If your performance at least one of these rules are rejected, which means that the unit provides either high or low voltage, and hence is defective.
