What s going on when the computer monitor doesn t turn on, the host is on, the monitor light is also

Hello:The host is on, the monitor light is also on, and the keyboard light is not onThe main unit (light) is on, which means that the motherboard has been connected to the power supply, does not mean that the host is working properly. WhileThe keyboard light doesn't come on, descriptionThe operating system is not starting(The keyboard requires a driver for the operating system).

2. If the operating system is not started, the display will naturally be thereScreenDisplay (.)The monitor won't turn on, but the light is onup. You can restart the computer, press F8 to enter safe mode, see if it boots, or you can choose the last normal boot mode. If that doesn't work, it's time to reinstall the system.

Well, if the keyboard light is on, the keyboard is fine, the monitor light is on, the power supply is fine, and the host can also be started, it may be that your host and the monitor are not in good contact, replug and unplug it, if it still doesn't work, the graphics card is loose or the host operating system is broken, the graphics card is loose, open the chassis and plug the graphics card back in, if not, reinstall the system with a disc.

Plug the monitor cable back in.

Do you know the method of elimination, just take it apart and see if it's loose! It's not loose or it's not lit, just take it to the repair shop to see, after all, you don't understand it yourself, and you don't have a test tool! Don't make a small problem a big problem yourself!

Does your buzzer have an alarm!

First, the computer memory is not plugged in tightly or the gold finger is oxidized.

Second, the motherboard button battery is discharged.

Button battery discharge is very simple, the motherboard battery will have a button, use your hand or a screwdriver to loosen the button battery clamp, then the motherboard CMOS battery automate**, then we can directly manually remove, put the button battery for 10 seconds, reinstall the site, we test the boot.

Note: At the same time, we have also experienced situations before where the main computer lights up after the CPU is removed and reinstalled. You can also try it, but the process is a bit cumbersome. Before reinstalling the CPU, the CPU cooler needs to be uninstalled.

If there is such a problem of no display on boot, it can definitely be a hardware failure of the computer host. If it can't be solved, check whether the motherboard has obvious damage such as capacitor bursting, or replace the host power supply, if you still can't find and troubleshoot, then it is recommended to send the computer host for repair.

1. Press the upper and lower case on the keyboard. The light is on, indicating that the graphics card, monitor, and other hardware are faulty.

2. If the keyboard light does not light up, it means that it is a memory, CPU, motherboard, or power supply problem.

Solution: 1. If the keyboard light does not light up, first wipe the memory module with an eraser, and check whether the gold finger of the memory module has any burnt marks. Replace the memory in the slot.

2. Check the capacitors and resistors on the motherboard to see if the capacitors are bulging, whether there is a burning smell on the motherboard, and clean up the dust on the motherboard.

3. Remove the CPU fan, power on and turn on, test whether the CPU has a temperature change by hand, if not, the CPU is not working, either the motherboard is broken, or the CPU is not plugged in properly, and the CPU is re-plugged.

4. Power supply problem, although the power supply is powered on, but the motherboard can not work normally, replace the power supply and try it.

5. If the display card is loose or oxidized, the keyboard light will be on, the screen will not be displayed, wipe the gold finger of the graphics card with an eraser, and check whether the capacitance on the graphics card is bulging.

6. Minimize the test method, only leave the power supply, motherboard, CPU, memory, graphics card, keyboard, monitor, unplug all the wires on the rest of the motherboard, use a screw knife to short the switch pins, if normal, add the rest of the hardware, piece by piece, until the cause of the problem is found.

It may be a memory module problem, it is recommended that you open the computer case cover, pull out the memory module, use an eraser to wipe the gold finger position of the memory module, and then clean the dust of the memory slot, and then plug the memory module back in to see if it can return to normal.

This situation should still be on the motherboard, all the lights are not on, indicating that only the power supply of the computer is working, and the fan is turning again, it should be that there is a problem with a certain power output, try to change the power supply.

It could be that there is a problem with the host power supply. The console doesn't work, and the monitor doesn't light up. FYI.

If the keyboard light is not on, it means that the host is still not powered on, and in this case, you still need to detect the hardware problem.

It is possible that the software or hard disk is broken, and it cannot be started, and it will crash just after starting.

Check the plug-in connector, unplug the memory module and wipe it on the plug-in, and try.

If everything was fine when you used it before, but this time it suddenly happened, it was judged to be a problem with the memory module. It is recommended to reinsert the memory module.

If you want to enter the system before, you need to press F1. Judge that the motherboard battery is powered off.

There are many such antecedents. The judgment must be based on the previous situation to be accurate.

It is recommended to describe the previous situation into the problem, so that the big guy can help you solve the problem accurately.

The computer display may not light up because the display and keyboard light are turned off, and Qingtan needs to turn the display and keyboard light back on. It may also be because the memory module or graphics card is not in good contact, and you need to replug the memory module and graphics card inside and clean the gold finger.

When the display screen is not lit and the keyboard is not lit after the computer is turned on, you need to consider whether the keyboard light and the display screen are turned on, you can press the "numlock" key on the number key on the right side of the keyboard and the turn on button of the display, if you press it to display normally, it means that the previous display and keyboard light are off.

Poor contact of memory or graphics card is also a common reason why the computer monitor and keyboard lights are not lit, at this time, Shouxiang can disassemble the computer case, and then re-insert the memory stick, graphics card and clean the gold finger, that is, the metal cable on the card, the computer can generally be recovered.

When the motherboard is unstable or there is dust inside, it will also cause the computer monitor to not light up. At this time, you can unplug the data cable connected to the screen at the end of the motherboard, and then turn on the computer to see if it can self-check, so as to eliminate the black screen phenomenon caused by hard disk failure and other problems.

The computer boots up, the monitor does not light up, and the keyboard does not respond, causes and countermeasures:

1. The spine of the monitor plug key is loose or the signal cable is damaged. Plug in the draft pie plug or connect with a new cable.

2. The keyboard socket is loose or damaged. Plug in the plug or use a good keyboard to try the wild car.

3. The gold finger of the memory module is dirty. Shut down the memory with an eraser strip to erase the gold finger of the memory, and clean the slot with a brush.

4. There is a gold finger of independent graphics card. Do the graphics card cheat clean, clean the slot with a brush.

5. The CPU is overheated, and the motherboard self-test overtemperature is shut down protectively. Check whether the CPU fan is turned on and rotated, if it does not, the fan is broken, replace the fan.

The motherboard fan plug falls off and plugs it back in. If there is a fault in the auxiliary circuit of the motherboard, check whether there is an electrolytic capacitor drum top, replace the electrolytic capacitor or send the motherboard for repair.

6. Excessive dust accumulation in the machine causes the fan speed to be low and the dust is removed. Hope it helps. If the computer boots up and the monitor does not have a signal, and the keyboard light does not light up, it should be a hardware failure.

Solution: 1. When turning on the machine, see if the power indicator of the host is on.

2. If it doesn't light up, check the power supply.

3. If it is on, listen to the boot prompt.

4. If there is, check the graphics card, monitor and signal cable, as well as the motherboard.

5. If not, check the CPU, memory, and motherboard.

If it is 5, you can plug and unplug first, clean up the memory and CPU, discharge the motherboard, and restart it in two ways. Eliminate the possibility of false connections. This answer applies to most computer models such as the Dell G15.

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The hardware that can be checked is: monitor, graphics card. Put the motherboard down and wipe the graphics card and memory before installing it. Let's look at the results.

See if the cable of the monitor is in good contact with the host graphics card

1 The power supply put the motherboard battery to discharge.

2 Check that the monitor is plugged in.

If it doesn't work, take it to a professional place for testing.

Possibility 1: The monitor is broken.

2: The cable between the host and the monitor is loose.