ComputersEquipment

The computer does not turn on, the black screen, coolers work. Reasons, solution and recommendations

Often gamers face the problem: computer does not turn on, black screen, coolers work. The problem occurs after a mechanical impact against the housing or due to other factors. With these characteristics, you can say with certainty that part of the power supply circuit is exactly whole.

Possible problems

On the motherboard there is an indication of the status of the PC. If the blinking diodes change, the computer tries to start. We consider the case when the computer does not turn on, the black screen, the coolers work.

It is often possible to start the start page after several restarts. Users are lost with a completely missing picture. In such situations, difficulties arise even for experienced electronic engineers.

The easiest way out is to refer the system unit to professionals. But what if the PC is old, and its cost is much less than the cost of repairs? Then you have to understand yourself, following the advice of experts in succession. Information can be obtained from more experienced users, but you should not trust it completely. Comments even children write, it is not possible to check the competence of the counselor.

Explicit signs of malfunction

Malfunction: computer does not turn on, black screen, coolers work. Pay attention to the activation of the sound signal of the start of the PC. If an alert occurs, you can talk about starting the BIOS. The power supply has started, but if the fans stop, protection is triggered. This happens at the moment of short circuit in the boards or places of adhesions to the housing.

It is possible to reset the fault in case of a fault only by eliminating the cause of the fault and switching the tumbler of the supply network. It is not recommended to start the PC again and again, so you can disable the motherboard and the power module itself. Let's highlight two typical problems that directly point to the source of the problems:

  • Sparkling is a clear sign of an internal closure.
  • Stopping fans.

In the event that the changes did not occur and the malfunctions remain, they proceed to a full analysis of the equipment operation. Just like before, the computer does not turn on, the black screen, coolers work? I'll have to deal with the malfunction myself, so as not to become a cash cow for numerous services.

Diagnostic sequence

The entire procedure for finding the source of the problem is divided into four points:

  • Defined with the signs of a malfunction, hence the sequence of the following steps is built. In our case, the computer does not turn on, the fans are running.
  • Inspection - all the covers of the system unit are opened, the inner contents are carefully studied. Often PCs are put in garages or in a zone of accumulation of dust and metal shavings. If it is found inside the garbage, it is recommended to clean all open spikes, wires, chips. To do this, use alcohol or compressed air. You can also use a brush and a vacuum cleaner.
  • Restarts. If the failure starts, disconnect each element from the motherboard. Observing the state of the LEDs, they make conclusions about the health of individual modules. Leave only the processor, power supply.
  • Diagnosis is based on the user's skills. Inspect the burned paths and elements. A sign of malfunction are swollen capacitors.

Main causes of malfunction

When the fans turn on, and the computer does not work, it often happens that the startup does happen. In this version, you should look for a malfunction in the monitor. First, inspect and change the video cable if possible. The operating status is determined by connecting to a laptop or other PC.

A video card is a loaded element, it often breaks down from fans to play dynamic shooters. The board is pulled out and tries to start the computer on the internal graphic module. The start-up is controlled by digital indicators. Difficulties are diagnosed with BIOS and motherboard bridges.

How to eliminate?

The computer does not turn on, but the coolers work? First of all, after checking the internal content, try to restore the BIOS. Reset to default settings will occur after removing the battery. It is better to replace it if the computer is more than 5 years old. After the procedure, you need to set the clock and date. In the event that coolers spin, the computer does not turn on, as before, analyze the position of the jumpers on the motherboard.

This state is observed when the jumper jumper is set to the BIOS clearing position. Correct positions inexperienced users can be confused when manipulating the internal content or replacing the motherboard.

The jumpers are changed to force a BIOS reset. We must remember to return them to their place. All manipulations are carried out on the switched off system unit. Similar actions are taken at the beginning of the diagnosis. In more than half the cases, a simple operation helps to start the device.

Additional measures

Often the unit does not want to start due to a malfunction of the start button. But in the first seconds the fans start, stopping chaotically. The result of the "law of meanness" is the burned south bridge of the motherboard. It is responsible for communication of slots and the processor with the north bridge. Such cases occur because of incorrect connection of devices or USB flash drives.

The latter option will lead the user to an electronic technician. Only he can remove the defective element. But the repair procedure is costly and it will be difficult to verify the correctness of the actions. Therefore, it is recommended to contact the service centers, where the whole process is debugged to the smallest detail.

Before seeking qualified help, you should try to clean the fans from dust, inspect the wires for bends and opening the insulation. Also disable the start button from the motherboard. Then there is a chance that the PC will work.

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