What should I do if the hard drive becomes unresponsive after the computer is turned on?

1. Is the power supply working?

To determine whether the power supply is working, you can check three places:

(1), Is the cooling fan on the back of the power supply not spinning? Note: If the power supply is broken, its cooling fan will definitely not spin, but it is also possible that the fan itself is broken, so you should also check other places to determine whether the power supply is broken.

　(2) Whether the POWER indicator light on the computer host panel is off. Note: The LED indicators on the computer host indicate the working status of the power supply, hard disk, and floppy disk. If these LED indicators do not light up, it is likely that the power supply is not supplying power.

　(3). Do you not hear the sound of the floppy drive, hard disk or optical drive working during startup? Note: The computer will check these hardware devices when starting. If you cannot hear these sounds, it means that the power is not supplied to them at all.

If it is determined that the power supply is not working, do not think that the power supply is broken first. You can check the following places:

(1) Whether the main switch has tripped and whether the plug is loose. If it is used If you have an extension cord, check to see if the fuse on the extension cord has blown.

　(2) Whether the power supply stops supplying due to a short circuit: Since the power supply itself is designed with the function of detecting short circuit, it will automatically cut off all the power when it detects a short circuit in the output circuit. power supply, causing the power supply to not work. This situation can be seen from the operation of the cooling fan. If the power supply is good and there is a short circuit somewhere inside the host, when the power is turned on, you will find that the fan stops after turning and makes a hissing sound. , if the fan rotates a few times after turning off the switch, this symptom is a typical short circuit phenomenon. To find out the component causing the short circuit, you can unplug all the DC output connectors from the power supply. If the short circuit disappears after all the connectors are unplugged, it means that the circuit of a certain component is short circuited. You can Insert the connectors back one by one until the short circuit occurs again, then you can confirm that the component is broken and replace it. Please note that the power must be turned off before unplugging and plugging in connectors to avoid burning computer parts.

　(3) Whether the DC output of the power supply is normal: If the above three points have been checked and the power supply still does not work, a three-purpose ammeter can be used to measure the DC output of the power supply. , if there is no output at all, it means that the power supply itself is broken, and replacing the power supply should solve the problem.

　2. The power supply is normal but still silent

　(1) Problems with the monitor itself

If the power supply is normal and various errors on the host panel appear during startup The LED indicator lights are all on, especially the hard disk indicator lights are flashing and working, indicating that the computer has started normally, but the monitor has no display at all, and no alarm sound from the speaker is heard. At this time, please check the power switch of the monitor. If it is turned on, you can check whether the power indicator light on the monitor is on. If it is not on, it may be that the power cord of the monitor is not connected properly, or the power switch of the monitor is not turned on at all. If the indicator light is on, please check whether the brightness and contrast of the monitor have been adjusted properly. If the brightness of some monitors is adjusted to the lowest level, it will be completely black. Of course, the monitor will not display fully at this time. If the problem persists, you can borrow a good monitor to determine if your monitor is broken.

　(2). CPU problem

If there is no problem with the power supply and the monitor itself is good, but there is still no sound or video, there may be a problem with the CPU, including the CPU not being plugged in properly. (The direction of the first pin of the SOCKET 7 CPU is incorrect or the CPU is not fully inserted). The overclocking is too aggressive, the frequency is adjusted too high, and the CPU cannot run at all. The CPU core voltage adjustment is out of range. If the After solving the above problems, it still cannot start. It may be that the CPU itself is broken. Try changing to another CPU.

　(3), Others

If the first three checks are completed, the problem still cannot be found. It is possible that the hard drive cable is connected backwards. Note that the side with the red core should be closest to the power interface. It may also be caused by poor contact between the graphics card, memory and motherboard, which may also result in no display at startup.

If the above steps cannot eliminate the fault, then the computer may have a hardware failure, mostly the motherboard failure. It is recommended to take it to a professional repair site for repair

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