The computer turned on the motherboard without any sound, the memory and graphics card were unplugge

Check the problem of the computer, you need to check the accessories one by one, first check whether the accessories are connected in good condition, and then remove the graphics card and memory respectively and take it to another machine to try, check one by one, if there is no problem, it is basically a problem with the motherboard, as for the power supply, hard disk, it is generally unlikely that there will be problems, but extreme cases are not excluded. Good luck. I hope you, original.

Occasionally, the machine lights up to show that the host is not broken.

There is no moving memory. I can start it occasionally, too. Instructions rule out basic physical damage to memory.

However, it is still recommended to talk about the memory gold finger rubbing.

Unplugging the optical drive sometimes lights up and sometimes doesn't.

In my personal experience, it seems that your power supply is insufficient.

You can remove both the optical drive and the hard drive. See if the self-test screen will light up every time.

If it's okay every time, the motherboard, memory, cpu are all good. 80% is a power supply problem if it can't be lit every time. It is likely that there is a problem with the motherboard.

Furthermore. You can use a brush to wipe the dust.

Other things are generally not very susceptible to breakage.

The newly bought graphics card conflicts with the motherboard, or the motherboard sinks.

If the memory and graphics card are removed, there is no sound proof that it is a motherboard problem, of course, the premise is that you have to power on the host computer to be normal.

First make sure that there is a problem with the small speaker on the motherboard, and if you don't call the alarm when you pull it out, 90% of it is a problem with the motherboard.

You see if the power supply fan is spinning or not, and if it doesn't turn, the power supply may be broken.

The possibility of a power supply is higher, find a power supply and try it.

The problem is simple, the motherboard is broken.

There are several possibilities for motherboard failure.

1. The Nanqiao chip burned out.

2. The slot of the graphics card or memory is broken.

3. Some small capacitors or large capacitors can be seen bulging.

4. The network card chip was damaged by lightning.

If it is turned on, there is no display and no alarm when it is powered on, it should be a problem with the motherboard.

Did you add the discrete graphics card later? If so, then there are several possible problems:

1.Compatibility issues. But that's less likely right now.

2.It is powered by the mains. I feel that this is more likely because you described that after using a discrete graphics card, there is no motherboard boot beep. I think it may be that the power supply is insufficient after the graphics card is attached, which causes it to fail to boot normally.

If it is the original standard graphics card, it ......I think about ......

1.The gold finger should be cleaned and the PCI-E card slot should be cleaned.

2.……I can't think of it, let's look at the power supply problem, and the other possibilities are really small

It is most likely that the graphics card and motherboard are not compatible.

It may be that there is a problem with the discrete graphics card, you can take this graphics card to another machine for an interview, and use the elimination method!

Clean your graphics card gold finger with an eraser, try again, and if it doesn't work, just warrant it, either the motherboard is broken, or the graphics card is broken.

It's very simple, the graphics card is broken.

There are two possibilities for no memory and no alarm:

1. The buzzer or PC horn is broken, and the alarm cannot be heard.

2. The power supply, motherboard and CPU, at least one of the three major pieces is broken.

This is because: 1. When the computer is turned on, in order of use, the three most basic parts are the power supply, motherboard and CPU. If one of these three things is faulty, the other hardware will not be alarmed.

2. The CPU is generally not broken, and the power supply may not be broken if it rotates, and the most likely of these three is the motherboard.

3. Use the replacement method to test, or send it to the repair shop for maintenance.

Most of them are these five possibilities.

The motherboard is broken. To change.

The CPU is broken.

Reinsertion may solve the problem.

The motherboard does not have a buzzer (the small horn that alarms), and some DIY machines are often not plugged in when assembling machines (because many motherboards have their own buzzers) [if the boot is normal.

It doesn't matter if you call the police or not

Some cards are caused by bad (I encountered that the network card is not inserted well and damaged, resulting in no display and no alarm sound when booting), and the boot is normal after unplugging the card.

BIOS failure (if there is no condition to refresh, remove the battery for 3 minutes and then install it) The owner of the building press 5

Let's check the motherboard in order

Hehe,The first time I heard that the data cable of the optical drive can be burned when plugged into the hard disk.。。。

It's very difficult to judge the landlord in this situation, I can only tell you which hardware is wrong in this situation! The first memory, in the case that the motherboard can not detect the memory or the memory is in poor contact with the motherboard, it will not light up, the second CPU, the CPU will not light up the display when it is burned, and if the CPU is burned out, it will also prompt that the memory cannot be found when tested with a test card! The third is the motherboard!

You can find a computer and try it out!

Didn't call the speaker to connect, you are a problem with the motherboard, can you use the motherboard diagnostic card to see the number of runs? It can also be measured with a multimeter. Does the motherboard have a VCC voltage? If you don't know, you can only take the motherboard to the computer city to repair it.

Is the memory module wiped ready?

If there is no sound, it should be a problem with the sound card, how can it be a graphics card?!

What do you mean by no sound when you turn on the phone? Is there no sound after entering the system? Or is there no dropping sound for boot detection?

In this case, the boot fails to pass the self-test. There is a hardware fault with the computer.

The computer does not self-test, which should not be the reason for the graphics card. If the graphics card is damaged, unplug it and turn it on, the motherboard should alarm you.

Here are some steps to check for you:

1. Unplug the memory module and power it on.

2. If you still don't call the police, unplug all peripherals connected to the computer. That is, only the CPU remains, and then the power is on.

3. If there is no response, it is best to plug in the motherboard diagnostic card, and then judge the position of the stuck during the self-test according to the display of the diagnostic card, and then check the relevant circuit.

sound card, broken, or reinstall the sound card driver.

Does the lack of sound have anything to do with the graphics card?

1All you said that the graphics card comes with the motherboard, that is to say, you use the integrated display, but then you said that the cable connecting the graphics card to the display is good, and you didn't figure out whether it was a centralized display or a separate display?

But anyway, you try the following:

1. Confirm that the power cable and data cable of the display are plugged in;

2. If you use an independent graphics card, unplug the graphics card, and plug the display data cable into the VGA interface of the motherboard to see if there is a display;

3. If it is not displayed, unplug the memory module and plug it back in, it may be that the memory is not plugged in well, and then turn it on;

4. Not yet, all the accessories are removed and reassembled;

5. If there is still a problem, then it should be sent to a professional maintenance place to see if it is a compatibility problem or a broken part.

First of all, you make sure that your monitor can be displayed normally when connected to another computer, which means that there is a problem with your computer, and then find an OK monitor connected to your computer to see if it can be displayed, you need to eliminate the display problem, and then look at your computer settings.

The cable of the monitor is connected to the wrong one, and it may be connected to the integrated graphics card, so it is not displayed.

1.Turn on the computer and try it in VGA mode.

2.Check the signal cables.

3.Check the power supply.

Strictly speaking, there should be no sound on the onboard sound card, please do it like this:

1. Check whether the driver of the sound card is installed, take a drive disk of any brand above Intel845, set the search driver from the optical drive, and generally you can search for the 865 sound card driver;

2. Whether the sound card is disabled in the BOIS setting of the motherboard, the default value of the sound card of the motherboard should be enable;

3. Is your audio cable resistant to abrasive obstacles, and is the speaker renting normally? Try changing the machine;

4. Is the sound card volume set muted or the volume turned down too low to be audible?