When I turn on the laptop. It power cycles constantly.

It is not an easy task to arrange all the necessary components in the laptop case, especially because doing that one has to think really carefully about how and where to place the cooling system. That is why quite often various laptop elements simply fail. Let’s take a closer look at the main malfunctions that may lead to a spontaneous shutdown at boot.

Damage to the HDD or SSD may occur for various reasons, for example, due to physical damage if the laptop falls down. Another common cause of hard drive failure is a sudden shutdown of a laptop, due to which the driver must make an emergency stop. If the hard drive itself or the operating system files on it were damaged, the laptop may turn itself off before it is fully loaded. In such a situation, it is recommended to check the hard disk by installing it into another computer (meaning the one that has no problems at boot).

A common reason for a laptop to turn on and then immediately off is CPU overheating. In most cases, it occurs due to the absence of thermal paste (or it might be present but way too dry). If this is the case, you will need to replace the thermal paste, which can be done independently, if there are no difficulties with laptop disassembling. It is much worse when the CPU overheats not because it is lacking thermal paste, but because of poor cooling when both – coolers and radiators – do not work properly. In this case, it is necessary to determine the cause of their failure and repair or replace them. There may be problems with replacing coolers in a laptop because often it is quite difficult to find laptop parts if it is not of the most common model.

According to the recommendations of all laptop manufacturers, every 6 months these devices must be sent to a service center for professional cleaning. This will allow the laptop to work as long as possible, without having problems with overheating. If the coolers of a portable computer are very dirty, all its components (CPU, graphics processor, hard disk, and so on) will overheat almost instantly after you turn your laptop on. As a result, there will launch overheating protection which will make your computer shut down. The easiest way to fix this problem is to disassemble the laptop and clean it properly.

Most often, the laptop turns on and immediately off due to a battery malfunction. Many users are buying laptops to use them constantly at home or in the office. So they are working on these devices with both – battery and power supply – connected constantly and simultaneously. This kind of operation is an emergency mode for the battery, and because of it the battery life most likely will be greatly reduced. If the battery ceases completely to hold the charge, your laptop may turn off immediately after you turned it on. It should be noted that this problem may appear not only because of strong battery deterioration. It also takes place if, for example, the battery terminals are oxidized and the necessary voltage cannot pass through them.

A short circuit may occur in the laptop motherboard for two reasons: the electrical network is unstable or the battery is not working properly. Most often the short circuit leads to the burning of motherboard capacitors, which is a serious problem. In this situation, you most likely will not be able to repair your laptop on your own so it will be a lot better to take it to a reputable service center.

Power supply unit malfunctions may also be a reason for your laptop to turn off immediately after it was turned on. It is necessary to check the indicator on the laptop’s power supply unit. Depending on the laptop model, it may work in different ways. Most often, the indicator should just turn green, and if it flashes, for example, you may assume that there is some sort of malfunction and probably consider replacing the power supply cable or the whole unit.