The computer switches on and then shuts down immediately after being switched on? Fix!
If your computer turns on and then shuts down, then we will deal with it in order. Right away I would like to point out that the first thing to do is to check the system for viruses. Usually after checking the problem disappears.
If the problem persists then follow the steps below:
- First of all check whether the power button (front panel) is stuck.
- Clean the system unit of dust. It is a conductor of electricity, and therefore it can cause a malfunction of some systems.
If the cause is not eliminated, go further.
How to Check? Connect another power supply to your computer, which you are sure is working properly, and note how the computer behaves afterwards.
Buying and installing an UPS (uninterruptible power supply) will help to insure against power supply breakage. Your machine will be insured against electrical surges in the network.
- Maybe the reason for such behavior of the computer is damage to any element of the system unit (processor, motherboard, RAM or graphics card). And the reason for this may be different factors (eg, overheating, voltage spike).
- To check the operation of the RAM (if it consists of several “slabs”),
- You can take them out one by one and turn on the computer and check its functionality.
If you think that the hard drive is failing, the system would have warned you about its malfunction when you booted the operating system.
As a side note! If you have met some problems with your computer you can read about how to enhance the WI-FI router signal or how to delete a page on And you can also read how to synchronize iPhone with computer.
I hope that the problem why the computer crashes and shuts down right after powering on is solved and you do not need to contact the technical center. If you still have questions I invite you to ask them in Комментарии и мнения владельцев. To all my readers, I wish you peace and good!
When the temperature of important computer components rises too high (90 degrees and above) an emergency shutdown can be triggered. It is necessary so that you do not burn the system. However, if there are too many crashes, that’s not good either. Overheating in turn may have its own causes, which you will need to eliminate:
- There should be ventilation. Before you disassemble and clean the computer, make sure there is nothing blocking the ventilation holes in the case. Around each one of them should be a gap needed for the intake of air.
- Dust buildup. First of all check your system unit for dust. If there is too much of it, it may well be the cause of overheating. Pay extra attention to fans. These need to be removed first. Remove with a soft brush, cotton swab. You can also use a pressurized air cylinder.
- Dried thermal paste. Often goes in tandem with dust contamination of the case, because the system unit or case has not been disassembled for a long time, and hence the thermal paste has not been changed there since purchase. It is applied to the chipset of the CPU and graphics card. It is recommended that you replace it at least every two years. We have a detailed article about replacing thermal paste and cleaning the case from dust.
- Power Circuits. In this case the mosfets. the transistors which provide the power supply to the CPU. overheat. You need to change the thermal gasket underneath if there is a heatsink on top. If there is no fan or heatsink, just dust it off and don’t touch anything.
Often overheating can still occur from running too heavy programs, but only in conjunction with one of the above causes. If running a heavy program by yourself causes overheating, it is recommended to improve the cooling system or not to run programs on the computer for which it is obviously not powerful enough.
Step Make sure that the power supply settings are correct
If the input power supply voltage settings do not match the standard for (the classic 220-230 volts), then your power supply will not work. And it can shut down right after you turn it on.
A PSU with such a setup will not work in Russia
Ways to fix the problem
Some manipulation and tweaking can eliminate the problem.
However before you start troubleshooting, check if your on/off button of the computer is stuck.
It is possible that after switching on the computer fans start, but they immediately shut down and the computer goes out. it is because the stuck button has started the shutdown process only after the power was turned on.
If the problem occurs after manipulating the hardware components
We are talking about a situation where the problem arose after cleaning the computer, replacing thermal paste, motherboard, clean assembly or replacement of any components.
If there are no notifications, signals on the screen at all, check whether the power of the processor is connected. This is a very common problem.
CPU and motherboard are connected by two loops. If one of them is not connected (usually a wide one) then you will have the problem described.
But the computer will start (you will hear a characteristic noise), but the screen will not turn on.
A motherboard short circuit is an unpleasant but common problem that requires its replacement.
Short-circuiting almost always occurs with the case and can be caused by many things.
Without special skills the user can only check whether there are special stands between the case and the board. and if they are in place, then the cause of the problem cannot be determined by himself.
If the standoffs are missing, it is an indication that the computer was assembled incorrectly. The board may still work if the problem is solved.
If the struts are in place, then the board is most likely completely malfunctioning and needs to be replaced at a service.
The problem occurs after you clean the computer, replace the thermal paste. In this case, after the first power on the computer worked at least a few minutes, and at each subsequent power on the computer would shut down after a shorter time, which decreased with each time.
This is a sign of severe overheating, which has occurred as a result of incorrectly replaced thermal paste.
The following errors are typical and cause a malfunction:
- Too thick a layer of thermal paste;
- A gap in the form of an air bubble between the processor lid and the heatsink;
- There are factory stickers on the heatsink or other components, along with which the device is placed in the case.
You should also understand that if you chose to replace the thermal paste, which can conduct electricity, its excess could cause a short circuit.
Important! Exactly because of such defects and possible malfunctions it is not recommended to try to clean the computer or change its components by yourself if you do not have enough skill.
Other types of problems
In a number of situations the problem occurs in the presence of other defects made during the assembly of computer components.
Therefore check the following:
- Connecting the video card. sometimes you need to apply pressure to do this, because the stub may not be fully connected;
- Density of the RAM insertion. if the slats are not tightly connected, the operating system and BIOS will not boot;
- Bent legs of the processor. if they are bent, you may have to replace it;
- Connecting a fan to the PC power supply;
- Support of the new CPU by other system components, BIOS (if changed);
- Try to turn off your drives and SATA devices. perhaps the problem is with them, and if they are disabled, the computer will not shut down.
Specific problem, typical for computers with system units. front panel connection error to the device. When it occurs, the power on/off button on the PC may not work correctly.
If the problem occurs without manipulating the hardware components
We are talking about a situation where the problem occurs all of a sudden. That is, at the previous start everything worked fine, but now the computer shuts down immediately after turning on.
There has not been any manipulation with its components, there were no falls, bumps.
Problems of old PCs
If the device is old enough (you can’t give the exact figure, because it depends on the original PC parameters) the physical wear and tear of any hardware component is possible. Short circuits, contact problems, power supply failure can occur (especially if the BIOS beeps when you turn it on, which it did not before). Dust accumulation also causes problems.
To determine that it is a physical component wear and tear can be judged by the fact that the severity of the problem increased gradually. before the computer turned on without problems, then. with the second or third time, and now it ceases to turn on at all.
At the same time the increase of expression can occur rather quickly.
This type of problems can be quite difficult to eliminate, so it is better to replace the device.
RAM card. one of the most vulnerable components, it often and quickly fails, in particular, burning / short-circuiting its contacts.
To help in this situation can only be a complete replacement of it.
The problem when the screen does not react to power on may be caused by a sudden conflict between the integrated graphics card and a discrete one.
In this case you need to disable discrete video chip and check the functionality of the monitor when connected to the output of integrated graphics card.
In order to eliminate the cause of the problem try to disable all additional hardware modules. Leave only the discrete graphics cards connected
Memory is one of the most vulnerable components, it often and quickly fails, in particular, its contacts burn or get short-circuited.
This situation can only be helped by its complete replacement.
The problem when the screen does not react in any way to the process of switching on may occur with a sudden conflict of integrated graphics card with a discrete one.
If all else fails, the motherboard is faulty.
If all the above has not helped to identify the problem and after disconnecting the button and starting the computer without it, as well as replacing the power supply unit, the computer still shuts down immediately after turning on, then with a high degree of probability the problem is in the motherboard.
At home it is difficult to check it and in this case we advise you to contact a specialized computer service.
Causes of PC power failure in the first few seconds
It is the power supply that shuts down the computer if it experiences heavy loads or a short circuit occurs. Since there is a feedback system, it monitors the voltage in all circuits of the desktop computer, and responds if the load increases or a short circuit occurs.
Every device which has a modern switched-mode ATX power supply. Has this function, which works in the same way:
The power supply turns on as soon as you press the power button on the computer, and does a self-diagnostic.2. Power supply is supplying 5 volts to the motherboard.3. Getting a PG “Power On” signal. Power Good)).4. Keeps running.
IMPORTANT! If any one of these steps fails, the computer will not start.
The computer shuts down right away after starting
Here things can be a bit more complicated. Problems with other computer components along with the above causes. So, if your computer immediately shuts down when you turn it on, the first thing you should look at is the RAM or the motherboard. Here it is recommended to diagnose from the simple to the complex, and you should start with the RAM.
Factors associated with RAM failures can be different. The system may freeze, games and applications may “slow”, the computer itself may suddenly reboot on its own. As we can see, not everything is so obvious. Nevertheless, you should check the RAM first, if only because it is the least time-consuming procedure requiring less time than checking the motherboard. The following article will describe in more detail how to check the RAM.
If the check does not reveal any faults in the RAM, the next thing you need to pay attention to is. it’s the motherboard. Checking a motherboard is a difficult task for the untrained person, but here are a few of the most common symptoms of a motherboard failure.
Often a motherboard can fail simply because it is nearing the end of its service life. This phenomenon is inevitable and it will not be economically feasible for you to repair it. If your computer is not heavily outdated, you can try to find a replacement motherboard, expired. If the PC is so outdated that running any more or less modern application or video will inevitably lead to a freeze, then most likely you have no choice, and should consider buying a more modern computer. Thus motherboard failure makes the owners of old PCs pay the most.
The second reason for the motherboard malfunction is the presence of cracks in the soldering. Such a defect can fix itself for a while, but this happens quite rarely, and soon the problem occurs again. And then you have to buy a new motherboard.
The third cause of the motherboard malfunction may lie in its capacitors, which can also fail. This situation can be solved by re-soldering the capacitors. How to determine which of the capacitors is faulty, and which is not, we will consider in this article a little later.
Finally, another cause of motherboard malfunction can be the chipset, which overheats. In this situation the computer will shut down when the operating system is already loaded. You can check the chipset for overheating with a multimeter; some manage to check it with your finger or tongue, but you certainly shouldn’t risk it that way, you might get burned.
Jammed power button
If the power supply is OK and its replacement does not fix the problem, it is worth checking the power button on the case. It often jams in a certain position and thus turns the computer on and off automatically. The quickest and most effective way is to disconnect the reset button and leave the motherboard running without the power button, by shorting the corresponding pins on the board.
If you find that the problem is with the button, you can switch the reset button to the power button by moving RST in the place of PWR_SW.
When I push the Power button all coolers are twitching, the button blinks once and then silence. But run the computer as follows: connect and hold the green wire with black PSU starts (coolers flailing at maximum)-press the Power button-cooler speeds are reduced-remove the jumper between green and black, the computer starts up as usual, but with one peak. It works fine until you turn it off. Restart according to the same scheme. Could you give me a hint??
I guess it appeared after resetting BIOS to “default”. Switching the devices off and on one by one did not clarify anything. Help me, please.
You forgot one more option to solve the problem. replacing the battery on the motherboard. My solution was exactly the following
Thanks a friend for the tip burned the motherboard for 5k
Replace the thermal paste on the graphics card and CPU. Probably a short circuit. Power supply started, but if the fans stop, it triggers the protection. This is what happens when there is a short in the boards or solder joints to the case.
Thanks for the article. I did as instructed. Didn’t help. But the person in the Комментарии и мнения владельцев helped: I, like him, stupidly changed the battery in the board. And it worked right away. Maybe that’s where to start the article?
I have no idea what to do with it
Added a variant to the article. Thanks for the tip.
Replacing the battery helped, thanks to the dude who accidentally solved everything)
And it helped me to disconnect the front panel USB (apparently shorted).
Help me please! My computer screen may fade, it can freeze completely and also today was like this, reboot, 3 months ago it could make ripples (multicolored bars) also once he went to sleep during the game.What is it?
The problem is the same as in the article, but the computer just suddenly shut down while I was watching a YouTube video and won’t turn on again. The battery is the problem or the motherboard. The board is broken? I don`t know if I should buy new hardware or replace the battery. Well, could the computer began so suddenly because it sat down?
battery has nothing to do with it. Try another power supply. If it’s not a problem, it’s a problem with the motherboard. the board.
Pin 4 and pin 6 of the power supply shorted, the unit works, that could be the reason? You have no way to look for native hardware, you just have to buy it
If the unit starts, then most likely it is working.
The problem is very likely with the motherboard. the board
Hello. The problem is the following, when you start the cooler is twitching and the com does not start. To start the PC, I remove the battery and put it back and the computer works, how to make a normal start without removing the battery?
Hello. I faced this problem: when I start my PC the coolers start working, then they shut down and then start working again. It goes around and around until you turn off the PC. There is no movement on the monitor. Sounds like a power surge. First thing to look at is the PSU or the battery may also be?
Yes, you should start with the battery and power supply
I wired 4 and 6 unit does not move when I connect the cooler and the CPU the same as before I tried thermal grease and the baby wipe it off so I have no idea what to do next, good luck and good humor.
Thanks man! I wouldn’t think about the battery!
I did everything as it was written here.е. I replaced the battery, then stole the power supply from work, did not help. And when I put in another RAM, the motherboard started. Thank you for the article!
Guys tell me why the computer runs without the cooler, and with it blinks once and then shuts down.
I have a kind of mystery, the PSU pin 204 shorted with a paper clip works, I check the voltage is everywhere with a tester, I put the screw directly and the vidu. they work, I connect the motherboard, the fans start to rotate and stop, okay, take a known working unit, the same thing, then I take the tested PSU and connect it to a known working motherboard, the same thing with a working motherboard, the fans start and stop, it feels that there is something missing that would start the engine, the first motherboard started without the button with a paper clip
The cooler starts spinning, stops and in a couple of seconds it powers on again and the computer continues to work with all peripherals except one RAM. What happened before. Computer stopped turning on, CPU cooler starts spinning and stops. The fans in both the power supply and the case continue to run. Monitor doesn’t turn on. Measures have been taken to replace the battery, turn off the peripherals. Only one piece of RAM is conditionally dead, but it works somehow without it. Exactly the chip, not the socket. What preceded. Connecting one monitor to a discrete graphics card with two DVI and HDMI cables simultaneously, then selecting in the display options to display only 1 because it was suggested to expand. Ten was updating its version at the time. Here, I have this situation. Why, what is the cause of the cooler stopping after startup, how to fix it? I think this is some kind of bug and this memory works. But, here, how to fix it Help, please!
If you have not changed anything and did not go into the system, the problem may be associated with the motherboard, often from the capacitors, visually inspect for bloated capacitors motherboard.In other cases, all previously described.
You have duplicated the above in part, formulated as delusional as possible “if you have not climbed into the system. Thank you!