What if the laptop doesn't turn on and the boot doesn't respond?

　Laptop power-on unresponsive Failure Analysis and solutions:

Failure phenomenon One: Turn on the power, press the boot button, the computer without any movement

　　Analysis:

At this point the power supply should be to the motherboard and the hardware power supply, there is no movement to indicate that the power supply part of the problem. (including the motherboard power portion)

　　Inspection ideas and methods:

1, power problems, please check the power outlet is normal, the power cord is normal.

2, chassis power problems, please check whether there are 5 volts standby voltage, the motherboard and power supply between the connection is loose, if not measuring voltage can find a power exchange to try.

3, the motherboard problem, if the above two are not a problem, then the possibility of the motherboard failure is relatively large. First check the motherboard and the power-on button line is loose, the switch is normal.

You can use the switch wire short to try, such as not only replace a motherboard to try, (note: Should try to find the same model or the same chipset of the Board, because the other motherboards may not support your CPU and memory)

Failure phenomenon Two: Press the boot button, fan rotation, but no image of the monitor, the computer can not enter the normal working state.

　　Analysis:

Fan rotation shows that the power supply has started, no image of the monitor, the computer can not enter the normal working state that the computer did not pass the system self-test, motherboard BIOS settings have not been output to the monitor, the failure should be out of the motherboard, video card and memory, but sometimes poor power and display damage will cause this

　　Inspection ideas and methods:

1, if there is alarm sound, the self-test out of the problem, the alarm sound is set by the BIOS on the motherboard, the BIOS has two types, AMI and award, most motherboards are using the award BIOS.

The BIOS for award is set to:

The long sound keeps ringing: the memory strips are not plugged in tightly.

One short: The system starts normally.

Two short: CMOS setup error, need to reset.

One long short: memory or motherboard error.

One long two short: monitor or video card error.

One long three short: keyboard controller error.

One length nine short: the motherboard BIOS flash RAM or EPROM error.

　　The BIOS for the AMI is set to:

One short: Memory refresh failure.

Two short: Memory ECC checksum error.

Three short: System basic memory check failed.

Four short: System clock error.

Five short: CPU error.

Six short: Keyboard controller error.

Seven short: System real mode error.

Eight short: Memory error displayed.

Nine short: BIOS chip inspection error.

One long three short: memory error.

One long eight short: the Monitor data cable or video card is not plugged in well.

2, if there is no alarm sound, may be the horn is broken, please follow the following steps.

A, check the memory, the memory will be removed with the eraser to wipe the pins, change the slot to insert the actual test machine. If there are more than two memory sharing, please use only one memory test machine.

B, check the video card, check whether the card is plugged in, remove the pins with the eraser after the installation in place after the test machine. Then unplug the video card and the monitor and try again to see if you can go to the next self test, if possible replace a video card to try.

C, check the motherboard, first remove the motherboard on an insulating plane (such as books or glass), because there is a time box deformation will cause the motherboard slot and board contact bad.

Check whether there are any foreign bodies in each slot of the motherboard, the tooth has no oxidation discoloration, if you find that one or two of the teeth and other teeth, it must be caused by oxidation or dust, please use a knife to scrape the surface of the teeth, and then plug in the card after the test machine, and then check the motherboard and the link between the button is normal.

In particular, the hot Start button, and finally, the use of the discharge method to reset the BIOS, the method is to take down the button on the motherboard, and so on after five minutes to install, or directly to the battery back to install two seconds and then reload, and then the test machine to see whether normal. If you have a condition to replace a motherboard try.

D, check the CPU, if the CPU overclocking caused by the fault, then the BIOS reset above should be resolved this problem, if not overclocking so check the fan is normal, it is not a good replacement CPU try.

E, the power is not good will also appear this phenomenon, conditional replacement power to try.

F, if the above-said method can not solve the problem, please remove the CPU, motherboard, power, memory, graphics and other hardware all unplug, and then the test machine to see whether normal.

If normal, after troubleshooting the power supply and motherboard problems, use the following symptom four method to resolve. If the test machine is not normal, then replace these components to try each.

　Failure phenomenon Three: After the boot, the monitor does not have the image, but the machine reads the hard drive, through the sound judgment, the machine has entered the operating system

　　Analysis:

This phenomenon indicates that the host is normal, the problem is on the monitor and the video card.

　　Inspection ideas and methods:

Check the monitor and video card connection is normal, the connector is normal, if conditions, replace the video card and monitor try.

　Symptom four: The video card and motherboard information are displayed after the boot, but the self-test process is stopped when it is made to a hardware

　　Analysis:

Display motherboard and video card information description Internal self-test passed, motherboard, CPU, memory, video card, monitor should all be normal (but the motherboard BIOS is improperly set, memory quality is poor, power instability will also cause this phenomenon).

The problem is more likely in other hardware (in general, the hardware is bad, the BIOS self-test is just not found, but can also do the next step self-test, if it is because of hardware reasons to stop self-test, indicating that the fault is more serious, the hardware circuit may be a problem).

　　Inspection ideas and methods:

1, to solve the motherboard BIOS setup improperly can be used to discharge the method, or into the BIOS modification, or reset to the factory settings (check the motherboard instructions will find the steps) on the modification of a point to note that the BIOS settings, keyboard and mouse alarm items such as set to fail to stop self-test, This behavior occurs when the keyboard and mouse are broken.

2, if you can read the self-test process, so generally speaking, the BIOS self-test to a certain hardware, then the possibility of failure of the hardware is very large, you can unplug the power cord and signal cable of this hardware, boot to see if you can enter the next step self-test, such as can be the problem of this hardware.

3, if you do not understand the self-test process, please drive, hard drive, optical drive power cord and signal line all unplug, the sound card, modem, Nic and other cards all unplug (graphics memory except).

The printer, scanner, and other external devices are all disconnected, and then press the hard drive, floppy drive, CD-ROM, card, the order of the outside equipment reinstall, install a hardware on the boot test, when a hardware problem, it can be judged that it caused the fault.

Symptom five: Through self-test, but unable to enter the operating system

　　Analysis:

This phenomenon indicates that the boot file is not found, if the problem is not the hard disk is the operating system is broken.

　　Inspection ideas and methods:

1, check the system self-test whether to find the hard drive, such as not understand self-test can use the boot disk to retry, put into the CD with light dispatch or boot floppy disk, the BIOS settings to be replaced by the optical drive (floppy) boot, reboot into a disk, into the "C:" Enter

2, if you can enter the C disk, indicating operating system problems, reinstall the operating system;

3, if you can not enter the C disk, indicating that the hard disk or partition table damage, using the zoning software to determine whether the partition can be partitioned, such as the partition can not indicate that the hard drive is broken, on the contrary is the partition table damage. Repartition can resolve the failure.

Failure Symptom VI: Soon after entering the operating system crashed

　　Analysis:

Enter the operating system after the crash for a lot of reasons, here only to discuss the hardware issues, from the hardware considerations, the problem should be in memory, power, CPU, and the various hardware of the heat of the several aspects.

　　Inspection ideas and methods:

1, open the chassis, watch the graphics card, the CPU power supply fans are normal rotation, whether the heat sink is more dust, whether the chassis is dirty (if cleaning dust must be a power outage) with the hand to touch the hard disk is hotter, normal state than the hands of micro-heat, if hot, you can determine the hard drive has problems

2, such as CPU overclocking, blame on frequency use.

3, the power supply, memory and motherboard quality is not caused by the fault can only be determined by the replacement after the test machine.

After the system is turned on, the fan has the rotation, the light is also bright, is the display screen does not show, the display screen's lamp also or does not have the same flash as the boot to be able to do?

First of all the plug in the back of the host unplug, press the boot button 15, this is to give the host static electricity, sometimes the weather changes will have static electricity caused this problem, the end of those threads by the original appearance plug back, boot to see if it is normal, if not, and then look down.

Then start with the hardware:

1, unplug power;

2, unpacking the boot box;

3, press a pressure plug in the motherboard memory and card;

4, pay attention to see the motherboard capacitance is not the phenomenon of slurry-if any, will be sent to repair;

5, the boot look, if normal, use it! It's not normal, so send it to repair.

The above is to the notebook computer boot no response fault analysis and solution of the introduction, have this problem friends can try.