Dell notebook. The keyboard is not responding. A blue screen appears when the device is turned on. I

The Didi alarm rang a few times.

Dear Hello, Dell laptop boots up all the time for a reason; Short: The system boots up normally. There is nothing wrong with the machine.

Short: General error, please go to CMOSsetup and reset the error option. 3, 1 long and 1 short:

RAM or motherboard error. Try to change the memory, if it still doesn't work, change the motherboard long 2 short:

Monitor or graphics card error Long 3 Short: Keyboard controller error, check the motherboard.

Long 9 Short: Motherboard FlashRAM or EPROM error, BIOS corruption. Try changing a piece.

Continuous sound (long sound): The memory module is not tightly plugged in or is damaged. Reinsert the memory stick, and if it still doesn't work, simply replace the memory.

8. Ringing all the time: the power supply and display are not connected to the graphics card. Check all plugs.

9。Repeated short beeps: There is a problem with the power supply.

The judgment is resolved as follows.

Repeated short ring, power supply problem.

1 long and 2 short, wrong monitor or display card.

1 long and 3 short, the keyboard controller is wrong. Check the motherboard.

2 short, general error, please go to CMOS Setup and reset the incorrect option.

1 long and 1 short, RAM or motherboard error. Try to change the memory, if it still doesn't work, you have to change the motherboard.

1 short, the system starts normally. This is something we hear every day and it also shows that there is nothing wrong with the machine.

Different voices represent different problems, and it is enough to deal with the problem according to the sound. Or if you have no maintenance experience and don't understand, it is recommended to directly find a nearby maintenance master to deal with it to avoid getting worse and worse.

The laptop screen is black, it may be a problem with the software or hardware.

One, the black screen caused by the software.

Sometimes after installing some software or hardware drivers, you find that after restarting, the computer can't enter the system and the screen has been black, which is the black screen of the laptop caused by the software. If it is due to software that causes a black screen, then to:

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For example, you can restart the machine and press the F8 key several times when the system is turned on to bring up the system's startup options menu.

Once the System Boot Options menu comes out, select Enter Safe Mode. If you can enter the safe mode normally, you can delete the software or driver installed before the black screen in the safe mode. Then restart the machine and see if the laptop can fix the black screen issue.

Second, the hardware causes the laptop to have a black screen.

Hardware-induced black screen for the following reasons:

1) The cause of static electricity, sometimes static electricity will cause the circuit of the notebook motherboard to be abnormal, resulting in no reaction on the screen after the power is turned on. You can try to turn off the battery and power of the laptop, and then press the power start of the laptop several times to let the machine release the static electricity. Then connect the power supply, turn it on, and see if it can solve the fault.

2) The memory is loose or the memory has a hardware failure. There are several major components of a notebook computer, including:

CPU, motherboard, memory, graphics card. These parts are indispensable, as long as one of them has a problem, it will cause the laptop to not function properly, the most common is that the boot does not respond. In general, the probability of CPU and motherboard failure is relatively small, and it is more common for the laptop to fail to boot due to loose memory.

At this time, first remove the battery and power supply of the notebook, if it is not difficult to remove the computer, you can open the back cover of the notebook by yourself and reinsert the memory. After plugging in the memory, power it on again, start the machine, and see if you can solve the fault.

3) The LCD part of the notebook is faulty. There are some notebooks that are a little older, and this may be the case. Display components generally include displays, data cables, and some other small parts. If you have a desktop monitor, try plugging it into a laptop.

VGA display interface, and then switch the display to on the laptop.

VGA external display. If you can switch to an external monitor, it means that there is a big problem with the display part.

4) The graphics card hardware is faulty, the graphics card is responsible for the source of all the display output of the computer, so it has a problem, and there is no display on the screen. If the graphics card is broken, the average user can't solve it, and the only way to solve it is to find the computer's after-sales service. If the notebook is within the warranty period, it can be taken for free inspection and repair.

The black screen at boot is mostly due to loose parts or virtual soldering of the chip, you need professionals to help you detect, common reasons: loose memory or problems with the memory itself, try to reinsert the memory or change the memory; The power supply chip of the motherboard is soldered or aged, the screen cable is loose or the motherboard short-circuits the power supply circuit of the screen; Graphics card, south bridge, north bridge BGA packaging chip virtual soldering or damage, generally there are more virtual soldering, just add soldering. Notebook hardware questions answered.

In general, it is common for the host computer to have a power supply problem. However, sometimes when the output voltage of the power supply is low, the host does not alarm, but the hard disk is lost, the reading performance of the optical drive is poor, and it often crashes. When these situations occur, it is best to check whether the output of each voltage is low, when +5V and +12V are less than 10%, the above problems will occur from time to time.

Because the power supply has a voltage output, it is often mistaken for a problem with the motherboard or the hard disk, and a lot of time is wasted. When the DC component is reduced, the high-frequency AC component in the power supply increases, which will interfere with the normal operation of the motherboard, resulting in system instability, and it is easy to crash or blue screen.

1. Fault characteristics of ASUS notebook computer motherboard:

1. The laptop does not start, and there is no display when it is turned on.

2. The laptop password is forgotten and cannot enter the system.

3. Laptops do not recognize optical drives, hard disks, floppy drives, serial ports, parallel ports, etc.

4. The laptop cannot install the operating system.

5Laptops often freeze, lose power, or restart automatically.

6. The laptop is powered on and the system cannot be entered.

7 Laptop battery cannot be charged.

8. There is a display when it is turned on, and the LCD screen is dark.

9. The external display is normal, and the LCD screen is white and flowery.

10. There are bright lines on the LCD screen.

11. The keyboard can't press the key.

12 keyboard keys.

13 keyboard auto keys.

14. The battery is not charged.

15. The battery can be charged, and the discharge time is particularly short.

Second, we provide the following commitments:

Fix within 1 business day;

According to your requirements, emergency special maintenance can be done within 2 hours;

The repair rate is guaranteed to be above 98;

The secondary maintenance rate is guaranteed to be below 2;

There is no charge for unrepaired motherboards, and the repaired motherboard is kept neat and completeFor the motherboard repaired by our company, our company has a free warranty of 4 months.

3. Maintenance method: first inspection and then maintenance, and the inspection is free.