One day I was given a young man as an intern who really loved computers, but did not understand them at all. At first I tried to find out his skill level required for system administration. Faced with deathly silence, I had to ask him questions about the hardware. The result was the same. Then I could no longer stand it and asked a question about what he would do if the computer did not start. The answer still amuses me. “To do this, you need to call a computer specialist,” my intern answered.
Despite the abundance of information on the Internet, I am increasingly bombarded with questions from both beginning computer builders and those who already have solid experience. Unfortunately, low-quality components are often imported to Russia, which affects the assembly results. However, let's look at the main reasons for PC failure. By the way, this algorithm also suitable for detection computer malfunctions.
So there you have it assembled computer and you, frozen with delight, press the Power button. And look in disappointment at the blank screen. This situation is quite common, although I personally encountered it only once. Let's now see how we can launch our iron friend:
1.If the computer starts up (the fans are noisy or the speaker is beeping), then proceed to the next steps. If not, then read this section carefully. There may be only a few reasons for a startup failure. Either the computer's power supply is faulty, or you simply connected the power button terminals incorrectly. IN in some cases The motherboard may be faulty. I don't think you're an electronics expert, otherwise you wouldn't be reading this article. Therefore, I will leave questions about repairing motherboards (and there can be a lot of reasons, ranging from swollen capacitors, faulty transistors, etc. to dead chipsets). However, the factor of a faulty motherboard cannot be overlooked. If you have a normal motherboard, then there will definitely be a power indicator there. It perfectly eliminates the malfunction of the power supply. The latter can be checked either on another computer or using a multimeter (tester). However, I personally acquired a tester relatively recently, but with additional computers I have no problems. Is the power supply faulty? Change everything. If the power supply is OK, then try to start your computer by jumping the PWD SW contacts to motherboard with a flat screwdriver, having previously disconnected the button connector. The PWD SW pins are located in a group of contacts at the front (usually on the left) of the motherboard. Often the contacts are color coded, in which case look for a green (lime) color. This will make it start. If you fail, then remove the battery from the motherboard and put a coin in its place. This way you will remove the residual charge and reset the BIOS settings to factory settings. If this does not work, then remove the motherboard from the case and run your hardware on the table. I came across cases that shorted the motherboard. Well, if this doesn’t help, then you’ll have to accept your fate and pay the price service center. You can't do anything with it at home.
2. However, the computer most often still starts, but the monitor screen remains blank. But here there can be a lot of reasons. It could also be a faulty processor. It may even be inserted incorrectly into the socket. The RAM may not be fully inserted into the slot or it may be faulty. All these problems are easy to detect yourself. Professionals have special devices called POST cards for these purposes. They read data from the BIOS and provide signal information that can be used to determine the malfunction. It's a good thing, but if you don't assemble computers on an industrial scale, then you don't need it. Often your assistant is the speaker on the case or motherboard. I’ll tell you a little secret - the computer already diagnoses itself at the startup stage, reporting these diagnostic signals to the speaker. Having beeped once, the BIOS reports that the system is working normally and there are no problems. But multiple signals indicate various problems. However, the speaker may be completely silent. Sometimes this happens due to the fact that it is simply not connected, but more often it is something with the hardware. In this case, remove the cooler on the processor, start the computer and turn it off after a couple of minutes. Place your fingers on the processor. If its surface is warm, then everything is fine. If not, then make sure that you do not forget to connect the four-pin 12 volt connector from the power supply to the motherboard. It is easy to distinguish - the four wires on it will have black and yellow markings. If it is connected, remove the processor and reinstall it in the socket. Try it to start. In any case, it is important for us that it is warm.
And if the processor is warm, the speaker does not beep, and the fans spin. Then you need to reset the BIOS using the method described in point 1. Be sure to reset the charge with a coin!
I always tell my clients that if the computer beeps, it’s very good. Despite the variety of BIOSes (and now UEFI), they still have some common features. So, for example, I always came across motherboards that indicated problems with RAM with two signals. If this happens to you, then remove the memory sticks from the slots and wipe their contacts with an eraser, and then insert them back. If the signals are preserved, then the memory is faulty. We'll have to change it.
Three beeps may indicate a problem with graphic system. Most modern motherboards come with a built-in video output (or the graphics are integrated into the board or into the processor, for example, Intel). If you have an external video card, then remove it and connect the monitor to the integrated video. The problem is resolved? Great, throw away your video card. But what should those who do not have a built-in video core do? Pull out the video card and wipe the contacts with an eraser and insert it back into place. Got an image? If not, then you need to go to a service center and check the video card there. Sometimes the problem may not be with the video card. So, for example, I came across a maternal Asus board, where the PCI-Express bus failed due to a burned-out transistor. However, this case is rather exceptional.
Well, if everything started for you, but the BIOS does not see HDD, check that all cables are connected correctly to it.
Computer problems are very easy to fix. Thanks to the block architecture, even a schoolchild can carry out repairs. I hope I helped you with this article.
Good afternoon friends! IN Lately Many users prefer to assemble the computer themselves. This is both educational and cheaper than buying a computer in finished assembly. Moreover, you yourself choose which boards you need. Some people order assembly from private specialists.
With such an assembly, there are often cases when the question is, why doesn’t the computer turn on? We can give ourselves the answer - the reasons have not been identified. The computer also often does not turn on when assembled by a computer store. Many people face this problem. This article is not enough to cover all these problems, but the recommendations given here will provide you with the first, and perhaps even the main, help in solving this problem. Now let's figure out our next steps. Why doesn't the computer turn on - the reasons for the failure?
The computer does not turn on when turned on, what should I do?
The first piece of advice is to be careful during assembly. After assembly, carefully check and inspect everything. After all, you are collecting it for yourself, and not for someone else’s guy. Also, during assembly, you should not rush, so as not to accidentally burn any element of the computer. Or God forbid the whole computer.
From practice it has been revealed that these problems arise less often in those who check everything done at once. Check yours, see if there are any chips on it, if it fits tightly on the socket. Before installing the cooler, be sure to apply thermal insulation paste. To do this, just one drop in the middle of the processor is enough. Check the quality of the cooler's connection to the processor (especially if the cooler model is non-standard). This is one of the main PC diseases in which the computer does not turn on - we will continue to look at the reasons. This check must be done not only upon completion of assembly, but also during assembly, after installing individual components.
Now let's assume your computer is assembled. You press the power button and get nothing. The PC is silent. What's happened? Let's think about it. Why won't your computer turn on? There may be several reasons.
Reasons for failure when turning on the computer
The most unpleasant option is that the PC does not want to turn on at all. The fans do not make noise, the PC Speaker does not make a peculiar squeak, etc. The worst option is if some of the computer elements are dead. Of these, the worst is if the motherboard, processor or power supply does not work. Non-working motherboard, the worst. But diagnosis in such cases is quite simple.
First of all, in this case, we need to remove the cover of the system unit and make sure that electricity is supplied to the motherboard? This is quite easy to check, if there is a special LED on the motherboard, it lights up even when the button is not pressed. Power button. The essence of this LED is a signal about the supply of power to the motherboard.
The problem is that every motherboard has such an LED. In this case there will be more fuss. But let's say you have it and it doesn't light up. Of course it can burn out, but this is rare. There is only one conclusion: - your motherboard is not receiving power and that is why the computer does not turn on.
Why might this happen?
Only if your power supply is broken or defective. This will also happen if the power supply is overloaded. Overload occurs when there is a mismatch between the power of the power supply and the energy consumption required for all elements of the computer. Therefore, as I mentioned in the article, the power supply must be taken with a reserve of 10% of the energy consumed by all computer components.
Also in this case, be sure to check whether the toggle switch (additional power button) is turned on. Such cases happen when the computer does not turn on when turned on, the owners are carrying out repairs, and the additional power button is simply turned off.
Andrey Zimin December 19, 2013
An anecdote in every article.
What could be the main reasons why a computer may not turn on? This question is asked by many users and novice assemblers. In this article we will try to give a number of recommendations on how to solve this problem on our own.
So, let's begin. You have assembled a computer or maybe upgraded it yourself and this exciting moment has come - the monitor, mouse, keyboard, speakers are connected, the power cord is also connected, this is important) you press the button and.... Nothing. A minute's pause, you are a little surprised and puzzled, we are familiar with this feeling, because we have assembled many system units, expensive and very expensive, gaming, office, home, and unfortunately, it happened that our computer assemblies also refused to start the first time.
Let's start diagnostics
- First of possible options: After pressing the button, nothing happens, the signal LEDs do not light up and the fans in the system do not rotate. We check the connection of the start button, whether it is connected correctly to the motherboard, we immediately diagnose it, remove the connector from the motherboard and close the two contacts with any conductive object, for example, a screwdriver, the computer starts up, great, we have identified the faulty unit.
- Second option: go further, visually check the connection of the motherboard power connectors and the processor power (4- or 8-pin terminal coming from the power supply), if everything is in order, you can, for preventive purposes, remove the BIOS battery for 5 minutes, (sometimes, but very rarely it helps) we try to launch it.
- Option three: turn everything off peripherals from the motherboard, leaving only the processor, processor cooling and power supply (to be absolutely sure, it is better to unscrew the motherboard from system unit) and again we try to start the system, if the treasured light on the motherboard blinks or the speaker squeaks, the fans come to life, then we look for the fault by connecting the nodes one by one (RAM, video card, hard drive, CD reader, sound card etc.)
- Fourth method: if all else fails and we don’t have a spare power supply, we diagnose ours. We disconnect the unit from the motherboard and all devices, connect the power cord, and close the two contacts on the large 24-pin connector to which the green and black wires are suitable. If after our manipulations the fan of the unit begins to rotate, then there is a high probability that there is a malfunction in the motherboard or the leg on the processor is bent (in the case of AMD). If you have Intel, then carefully look at the contact block on the motherboard socket; damaged contacts are very clearly visible.
- Fifth case: the assembled PC starts, but unfortunately, we see a black screen (the computer is working, but there is no image on the monitor). First of all, we reset Bios settings jumper on the motherboard (set to factory settings) and try to start it. If the result is the same, then in this case, first of all, the culprit may be the module random access memory or video card. This can be determined using sound signals at startup or if the motherboard is equipped with a post code reading module. If you are using two memory modules, then turn on each one in turn, and you can check the video card by removing it and connecting using the integrated video card. If these nodes are in order, then connect other devices one by one and identify the faulty node. Yes, we completely forgot, if you connect the monitor signal cable to the integrated video card connector and at the same time you will have discrete video card(external), then you will not get an image on the screen.
Now about the main thing.
Assembling a computer is not very difficult and sometimes interesting. The main thing is to remember a couple of simple rules. Do everything very carefully and take your time, follow the instructions if there are any, but if you are not confident in your abilities, we strongly recommend that you turn to professionals, at least for advice. And everything will work out. The online computer store “Edelweiss” assembles and sells expensive gaming system units. And therefore, having accumulated vast experience in this direction, they are always ready to give advice potential clients and not only suggest how to correctly assemble the system unit, but also diagnose the malfunction.
So you have purchased new computer and ready to start working. When all the components of the computer are nearby, not connected to each other, and there are a lot of different wires around, it may seem that you cannot cope with this task. There's really no reason to panic. The first launch of the computer will take place as planned.
In most cases, a small manual on how to connect it comes with the computer. But, even if there are no such instructions, you can still put everything together yourself in just a few simple steps.
Preparing to Start Your Laptop
If you bought laptop or netbook, then the preparation procedure before the first launch will take less than a minute. On some models you may need to connect battery. Once the battery is in place, open the cover and press the power button. If the battery is not charged, you will need to connect adapter alternating current , which comes with the laptop. While charging, you can continue working.
If you need to connect to a laptop peripherals, you can read the instructions below; desktop and laptop computers generally use the same types of connections.
Preparing to Start Your Desktop Computer
Step 1
Unpack monitor, system unit, keyboard and other computer components from the box. Remove all transport, plastic coverings or protective film. Install the monitor and system unit at your workplace.
Installation recommendations: Place the system unit so that there is enough space for air circulation to avoid overheating. It is better to position the monitor so that the light source is located to the left of the monitor to avoid glare.
Step 2
Take monitor connection cable. The monitor always comes with two cables, one for connecting to the mains, the other for connecting to the computer (system unit). Depending on the monitor model, the kit may include VGA, DVI or HDMI cable. VGA cable often have Blue colouron the chips connectors to make them easier to identify. If you bought monoblock, you can go to Step 4.
Step 3
Connect one end of the cable to monitor, You can’t go wrong with the choice of port, and the other end to the same port on the rear panel of the system unit. Be careful and careful, the connectors and sockets of the ports have a geometric shape, when correct connection no effort required. If your cable has screws, tighten them lightly to secure the connection.
Advice: If the cable doesn't "go" don't push it or you may damage the connectors. Make sure the cable connector matches the connector on your computer, and then connect it.
Step 4
Take keyboard USB PS/2(purple round connector).
If you are using a USB connector, connect it to any of the USB ports on the back of your computer. If you are using a PS/2 connector, connect it to purple
Step 5
Take mouse and determine which connector it connects to the computer. It could be USB(rectangular connector white or black) or PS/2(green round connector). If your mouse has a USB connector, connect it to any of the available USB ports on the back of your computer. If you are using a PS/2 connector, connect it to green round port on the back of the computer.
If your keyboard has USB port, you can connect the mouse to the keyboard instead of connecting directly to the computer. Or you can connect a USB flashlight to this port to illuminate the keyboard and desktop. And also the availability USB port convenient when connecting a flash drive, no need to look for a connector on the computer, everything is at hand.
If you have wireless mouse or keyboard may need to be connected to Bluetooth adapter(USB adapter), it comes with the wireless device.
Step 6
if you have speakers or headphones, you can connect them to your computer in audio port(on the front or rear panel of the system unit). These ports have different colors, as do the plugs for connection. Columns or headphones connect to green port, microphone connects to pink (red) port You can't go wrong by the color of the plug. Blue port can be used with other types of devices.
Some speakers, headphones and microphones have USB connectors instead of a regular audio jack. They can be connected to any USB port. In addition, some monitors have built-in speakers and a microphone; they will also need to be connected to the system unit. The same colored connectors are used for this.
Step 7
Take two power cable supplied with your computer and monitor. Connect the first power cable to the socket on the rear panel system unit, then in network filter . Then, using a different cable, connect monitor To surge protector.
Step 8
Finally, connect network filter into the socket. You may also need to include network filter it has a power switch.
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