How to deal with the smallest system of PC motherboard can not be lit

The computer is powered on and there is no display, which is usually caused by the oxidation of the gold finger of the memory or graphics card, or the static electricity of the motherboard. Here's how to fix it:

1. Unplug the computer power cord first, and press the on/off button on the chassis 5-6 times. Releases the residual charge of the motherboard.

2. Then open the side panel of the chassis and plug and replace the slots of the memory.

3. Remove the CMOS battery from the motherboard and install it after 1 minute.

The computer has a discrete graphics card, so it's best to plug and unplug the graphics card. After the above operations are completed, the computer is powered back on.

The fault still needs to be booted using the minimum system method: (power supply + motherboard + CPU + memory + graphics card + monitor).

At this time, you should normally see the display content, pop up the hard disk can not be detected, keyboard and other prompts, you can enter the BIOS, and the buzzer has no abnormal sound. If it is abnormal, the monitor does not display (or the screen is blurred) or the buzzer has an abnormal sound.

1) Memory issues.

a.Problems per se. It doesn't work in any slot, and it doesn't work on other machines. Then the only way to do this is to change the memory. Buzzers generally have an unusual sound.

b.Compatibility issues. Other machines can be used, but this one can't; Or a single root can be used separately, but two roots cannot be used. Change memory.

2) Display graphics card issues.

a.Wiring issues. Check if there is any needle breakage or short circuit.

b.The graphics card itself is damaged.

c.The monitor is damaged (very unlikely).

b.Motherboard issues. The graphics card slot part, or the related control circuit is faulty. At this time, it can only be solved by changing the motherboard.

Last time I had the same problem with my machine, you jump the BIOS jumper on the motherboard, or take the battery off the motherboard, unplug the power supply, and try to turn it on after a while.

Short the power supply.

Green line - black line.

Force to boot and see, and, to put.

Motherboard removed, old.

The chassis back has many strange problems!

If you can force the boot, clear the coms, if not, replace the power supply!

If you have a test card, it's easy to say, unplug all the things on the motherboard, including the CPU and memory!

Then get on the test card, power it up, and try them one by one!

Didn't go up to CPU**00 ff

on cpu**c1

on memory**.

26 on the graphics card.

Bright machine --- or above is normal.

If there is a strange ** such as 0b, the power supply is insufficient, replace the power supply and try again!

The possibility of BIOS bad is very small, you change the power supply to make it, if not, I suggest that you plug in the motherboard diagnostic card whether it is displayed, if there is a display, you can see what the diagnosis card description is, if these things are not good, then I suggest you take a look at the repair hardware,

Try a different memory. My problem is the same as yours, I solved it by changing the memory!

I also think it's the motherboard that doesn't work. Not a BIOS thing. It should be a problem with the quality of the motherboard, try it again!

Look at the instruction manual of your test card and see what 00 means by ha.

Generally, 00 seems to be the CPU, the power supply of the CPU, the capacitance near the CPU...

It's basically all around the CPU

Tomorrow, when I was using the computer, I suddenly crashed and crossed.

Gigabyte motherboards? After the motherboard is removed and discharged, it is set aside for half an hour to put it on and try it.

Daxian, tomorrow's events are expected to be the day after tomorrow.

It's so simple, but you're asking for trouble......

Tomorrow?? Oba, the earth is dangerous, you go back to the stars!!

Assuming that the hardware is not damaged, the most common failure may be due to poor contact of the dGPU or memory or poor CPU cooling, which you have dealt with but not in place. If the following operations are invalid, you need to establish a minimum system replacement check and use the motherboard diagnostic card to assist in judgment, and send it for repair directly if there is no condition.

Solution:1Shut down (if short press the power switch is invalid, press and hold the switch until the power indicator goes out or directly unplug the power cord) Power off the case, replug the memory module, and wipe the gold finger with an eraser in one direction (the back of the thumb fingernail is also fine), if possible, it can also be installed in different memory slots, and then turn on after installation (before operation, you should also touch the wall with both hands to release your static electricity or wear anti-static gloves).

If you don't know how to operate, then it's simple: slap or kick the chassis once or twice (pay attention to the location: the front of the shell on the left and right sides of the chassis that has no interface at the back; Attention Tract:

Don't push too hard, and certainly don't be weak). The above may need to be repeated, and if it doesn't work, you need to replace the memory module. If you have more than two memory modules, you need to test them one by one.

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. If it still doesn't work, consider that the cable or graphics card is damaged, then replace it with a new one.

3.Strengthen the heat dissipation inside the chassis and the use environment, especially check whether the CPU fan is loose and whether the thermal grease needs to be replaced.

If there is no response after the host presses the power button, the first thing is to check the power supply, check whether the power supply line of the power supply is connected, especially the power supply of the motherboard and the power supply of the CPU, and whether the connection of the power switch jumper of the chassis is wrong. If the host is running normally, but the monitor screen is not displayed, then there are many places to check.

Display. The common reason why the display is not displayed after the host is powered on is that the display is connected to the wrong wiring, we assemble the computer generally have an independent graphics card, but many people will connect the display to the output interface of the motherboard, this is the wrong way, because there is an independent graphics card, the default output is completed by the graphics card, so you have to connect the **wire to the independent display. Unless you don't have a graphics card and use a core graphics, of course, if you don't have a graphics card, you can only connect to the motherboard.

If there are many interfaces in the display, there are generally multiple input source options, for example, the display has VGA interface and HDMI interface, then the input source can choose VGA and HDMI, under normal circumstances, the display will automatically select the input source, but some may not, so you can call up the display settings menu to check it, and select the input source of the corresponding wiring.

Memory. The memory is not plugged in well is also one of the reasons for the black screen, the first is to check whether the memory module is fully inserted into the slot, it is best to reseat it a few times, or try to change the slot, if it is multiple memory modules, it is recommended to install them separately. In fact, this problem often occurs when we install memory modules on our computers.

Discrete graphics card. If you have correctly connected the monitor to the discrete graphics card, but it is still not displayed, it may be a problem with the graphics card, and check the graphics card at this time. Check whether the power supply port of the graphics card is connected and whether it is connected incorrectly, because some people may connect the CPU power supply to the graphics card, or connect the dual PIN to the single pin.

A customer sent a piece of MSI6566845 motherboard for repair, and it was not lit when it was reflected. The author inquired further and learned that when the motherboard was not lit, he only needed to take off the CPU fan and shake the CPU socket. The motherboard will work fine.

After the author's test, the situation is true. Since the CPU socket of this motherboard is in BGA packaging, the author preliminarily judges that it may be empty soldered. In order to further demonstrate the author's inference, the author brought the data cable of the load measurement CPU, and found that there was indeed an open circuit, so the author took out the maintenance tool oven, replaced the CPU socket, and repaired the motherboard.

2.Fault phenomenon: my friend's motherboard is Shuotec SL-65FV, some time ago he removed the motherboard for cleaning, and when he installed it again, he forgot how the switch and reset button were inserted in the row of pins, he used the copper key to sweep it on the row of pins, only to see a flash of sparks, and the motherboard was no longer moving.

Troubleshooting: According to the analysis of the phenomenon described by my friend, there should be a problem with the power switch or reset button? The author pulled out all those plugs and then used a metal chip to short-circuit the switch pins on the motherboard, but there was still no movement.

The author removed the power supply and replaced it with the author's good power supply, but the fault is still there. The author took the motherboard out of the chassis, removed the memory and CPU, and used the author's magic weapon "motherboard diagnostic card" to diagnose. Plug the "diagnostic card" into the motherboard expansion slot to power on the motherboard, but there is no response on the "diagnostic card".

The author decided to force the motherboard to power on, there is a green wire on the side of the main plug of the power supply, and some are gray, and the power is started by shorting it with the black wire next to it. The author found the pin connected by the green wire on the back of the motherboard with tweezers and the pin connected to the black wire next to it, and the power indicator on the "diagnostic card" flashed at the moment the power was turned on, and it seemed that the power protection device was operated by a short circuit somewhere on the motherboard.

Encounter this problem,And then see those"Seeming"Very professional,Maybe at this time"Old farmer"Thinking is very low, just enough to solve,According to the description of your problem,Other hardware and software are running normally,In fact, this is a problem with the display。 1. The power connection of the display is not connected (the display is not energized). 2. The data plug of the display is not connected, and the two ports containing the data and the data cable itself are not connected.

As a rule of thumb, first rule out whether the power supply is connected, and then eliminate the data cable. In fact, this problem is often "empiricism" makes us fall into the misleading of stereotyped thinking, as a computer, many will be motherboards and software and other aspects are prone to failure, so as soon as there is a problem, I will think about this aspect and find a solution, but I don't know that these physical hard connections will also have problems.

Since the other component issues have been ruled out, it must be a motherboard problem. Clean it up with absolute ethanol or check it for deformation? Other individuals will not be able to solve it, so they will have to replace the motherboard and try!

Try detaching the motherboard battery first.

Not yet. Unplug the hard drive.

Then buckle the memory module and wipe off the gold finger.

The graphics card is wiped off the gold finger.

If it doesn't work, you can take the computer store to repair it, and the hardware problem can only be repaired by returning to the factory.

Do you mean the computer, or the motherboard of the mobile phone, which can't be lit, so you have to see what the program is like? How to ask for it? Is there an instruction manual? It may not work according to the procedures in the manual.

It's best to buy a motherboard detection card, PCI slot, can display**, from which the message given is too little, it is impossible to judge what the cause is.

If the computer boots up and can load the information on the motherboard page, it means that there is no problem with the motherboard, and the first reaction is the memory module or hard disk when the computer is not turned on.

Since you said that almost all the major hardware is fine. If you're correct, then it's just a matter of your monitor or the cable connected to your monitor, and you might want to try changing the cable or testing it out with someone else.

Unplug (if there is a discrete one) graphics card and try it, or plug in a graphics card and turn it on to try it out to eliminate the graphics card problem.

Usually the motherboard is faulty or the power supply itself is faulty.

This situation is usually due to a faulty motherboard (damage, short circuit, etc.) that causes the ATX power supply to protect itself and not work, or the power supply itself is faulty and does not work.

Recommendation: In this case, it is best to replace and test with a normal power supply.

Remove all accessories and reinstall them.

I suggest that you turn off the computer first, then open the chassis, and then turn it on, mainly to ask and see if the mush comes from**. Generally, there will be problems with the electrofusion next to the motherboard CPU, you take a closer look yourself, is it there, if so, immediately go to the computer city to repair, generally 10 yuan for an electric fusion, to replace all of them. Approx.

Step 1: First of all, check whether the external wiring of the computer is connected, and plug in each cable again to see if the fault is eliminated.

Step 2: If the fault persists, then open the main chassis to check whether there is any excess metal in the chassis, or a short circuit caused by the deformation of the motherboard, and smell whether there is a burning paste in the chassis, whether there are burned chips on the motherboard, and whether the capacitors around the CPU are damaged.

Step 3: If not, then clean the dust off the motherboard and check if the computer is in good condition.

Step 4: If the fault persists, unplug the reset cable on the motherboard and connect it with other switches and indicator lights, and then use the change cone short-circuit switch to see if it can turn on.

Step 5: If you can't turn on the computer, then use the minimum system method, unplug the data cable of the hard disk, floppy drive, and optical drive, and then check whether the computer can be turned on. Then connect the above devices to the computer one by one, when connecting a certain device, the fault will recur, indicating that the fault is caused by this device, and finally focus on checking this device.

Step 6: If the fault persists, the fault may be caused by devices such as memory, graphics card, CPU, motherboard, etc. Then, use the plug-in method, swap method and other methods to check whether the memory, graphics card, CPU and other devices are normal, and replace the damaged devices if there are damaged devices.

Step 7: If the memory, graphics card, CPU and other devices are normal, then discharge the BIOS, use the isolation method, place the motherboard outside the chassis, connect the memory, graphics card, CPU, etc. for testing, if the computer can be displayed, then install the motherboard into the chassis for testing until the cause of the fault is found. If the fault persists, you need to return the motherboard to the manufacturer for repair.

Step 8: When the computer is turned on without display but there is an alarm sound, when the computer is booted up, the system BIOS starts to POST (power-on self-test), when it detects a fatal error in a device in the computer, it will control the speaker to send out a sound to report the error. Therefore, there may be a fault that the power is turned on without displaying an alarm sound.

If the computer is turned on and there is no alarm sound, the fault can be checked according to the meaning of the BIOS alarm sound to check the faulty device to eliminate the fault.

There are two main reasons for this:

1. Memory module problems.

2. Memory module card slot interface problem. It is usually mainly poor contact and stuck ash. In your case, it should be that there is dust in the card slot, or there is a card slot that is not in good contact, it is recommended to clean the card slot and memory module. If possible, you can use a brush to clean the motherboard.