The computer won t start, the CPU fan is turning, the screen is not displayed, and the hard disk ind

There are several scenarios:

1: If the memory is in poor contact, unplug the memory, erase the gold finger with an eraser, and then install it back.

PS: Sometimes it is easy to just swap out the two memory modules.

2: The graphics card is in poor contact. Unplug the graphics card, also use the eraser gold finger, and settle it back.

3: There is too much dust on the computer, it is recommended to remove the CPU, graphics card, and memory, and clean the machine.

PS: Computers that have not been used for a long time are prone to this kind of problem.

Landlord, you take down the CPU and clean it, and then put some silicone on it to try.

In view of the landlord's situation, it is recommended that the landlord refresh it in the BIOS, and then disable the sound card integrated with the motherboard, and then try again.

Suggestion: Connect the laptop to an external monitor with a VGA** cable, if the laptop can be connected to an external display, it means that there is a problem with the CPU management display part of the laptop or the corresponding pin part of the motherboard, and it needs to be repaired. Or use it directly with an external monitor.

If the external connection still does not show up, then the most likely reason is that the CPU is broken, please replace a CPU and try again (if you have an XPU with the same specifications), or send it for repair.

If the memory is not in good contact, unplug the memory, wipe the gold finger part of the memory with an eraser or A4 paper, and plug it in.

Unplug the independent sound card, if it can start normally, 1Poor contact of the independent sound card: Clean the gold finger with an eraser and reinstall it2

Independent sound card driver problem: first set the use of the motherboard's built-in sound card in the BIOS, after entering Windows, ** the latest driver of the independent sound card and install it, restart the BIOS to use the independent sound card.

If it does not boot normally, the graphics card and memory are not in good contact: clean the gold finger with an eraser and reinstall it2Motherboard battery is dead: Replace the battery.

If there is a problem with the memory, it will give an alarm, see if the graphics card is plugged in, make sure the graphics card is good, and then discharge the motherboard.

Change the monitor, change the cable, change the graphics card, try it, if it doesn't work, it's a motherboard problem.

Kenneng is a fan problem or a hard drive, and there is a greater chance of a problem in both aspects.

Take a look at the CPU fan dust.

Take a look at the power supply master.

The reason could be that the power supply is faulty or that the power supply is not being supplied.

Specific solutions:

1. Check whether the cooling fan on the back of the power supply is rotating to determine whether the power supply is faulty.

2. Whether the power indicator on the computer host panel is on, if these LED indicators are not on, it is likely that the power supply is not powered.

3. The computer will check these hardware devices when starting, if you can't hear these sounds, it means that the power supply is not supplied to them at all.

There is a problem with your computer's motherboard.

1. When booting up, we continue to press the F8 key, so as to enter the system operation menu, Huiqin file selected "Last correct configuration", and then restart the computer.

2. Press F8 when booting up, so as to enter the system operation menu, select "Safe Mode", if you can enter successfully, click "Start" - "All Programs" - Accessories - "System Tools" - "System Restore", and the "System Restore Dialog" appears Click to select the earliest system to restore.

3. We can also use the installation disc driver, you can choose to install the new system directly, or you can choose to repair the system, it takes a certain amount of time to repair the system.

Analysis: If the host indicator light is on or off, and the screen is not displayed (the power indicator is not on) or the display "no sighal" no signal, the former means that there is no power or poor wiring contact, and the latter is generally poor contact of memory modules.

Recommendations:1If the monitor shows no signal, turn off the power and turn on the case, plug in and unplug the memory module again, and wipe the gold finger with an eraser (the back of the thumb fingernail is also fine) in one direction, and then turn on the device after installation.

If you don't know how to operate, then it's simple: kick the chassis with one kick (note the location: the front of the shell on the left and right sides of the chassis that has no interface at the back).

If it's a notebook, you can't kick it, but it's the same for other operations.

2.If the above operations do not work, turn off the power and turn on the chassis, reinsert the graphics card, and plug in the data cable between the monitor and the graphics card.

3.If the monitor indicator is not on, look at the back of the monitor, plug the power cord that connects to the monitor upwards, and check that the other end of the power cord is powered on to the outlet.

If this happens on your computer, you can try the following methods to solve it:

1. Whether the cooling fan on the back of the power supply does not rotate, if the power supply is broken, its cooling fan will not rotate, but it may also happen to be 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 on the panel of the computer host is not lit, the LED indicator on the computer host indicates the remote working status of the power supply, hard disk and floppy disk, if these LED indicators are not lit, it is likely that the power supply is not powered.

3. Whether you can't hear the sound of floppy drive, hard disk or optical drive working when starting, the computer will check these hardware devices when starting, if you can't hear these sounds, it means that the power supply is not supplied to them at all.

CPU memory Graphics card (discrete) Integrated to find an independent to test The motherboard, all four pieces of hardware should be tested to find the reason why it can't be turned on.

The commonly used method is: hardware replacement test method, observe the alarm situation of the motherboard, and take it to a professional place to repair the computer when there is nothing.

You have to make a judgment first to determine if the motherboard is broken.

Remove everything from the motherboard except for the CPU and graphics card (memory, hard drive, etc.), and plug the monitor to see if it responds when you boot it.

Then add memory, add hard disk...

I feel like it's either the motherboard or the power supply.

The computer is turned on and the monitor is nothing, or the display shows that it is not close to the system, if it is not close to the system, then the hard disk is not good, if nothing is displayed, this is called the motherboard does not light up, and if there is a diagnostic card, you can see what is broken. You can also remove the fan and see if the CPU is heating up, if it doesn't heat up, the CPU is broken, the same test, if the monitor doesn't show anything, it's also possible that the motherboard is broken.

There are two uncertain factors. One is that the hard drive is broken. One is that the monitor cable is broken.

First of all, the monitor cable is broken, and the hard drive light will turn on. So exclude.

Next, if the hard disk does not flash, it means that the system cannot enter, and the display does not reflect if the system does not enter. But under normal circumstances, the display will reflect the following. This means that both your monitor and your hard drive are broken.

There could be four reasons:

The first is that there is a problem with the connection line between the host and the display,Try it with another cable,(A connection cable to(15 yuan or so) The second is that there is a problem with the graphics card,That is, the video memory of the graphics card is short-circuited,The performance of the main chip decreases,There will be a sudden failure to display,Try a different graphics card to know if yours is broken。

The third is that there can be a problem with the display itself, which is to repair the display.

The fourth reason is that the memory and graphics card are oxidized, resulting in poor contact between the memory and the memory slot, and the poor contact between the graphics card and the graphics card slot