Common problems and solutions for laptops

Source: Internet
Author: User
Tags touch

In the use of notebooks, in the face of a variety of faults, if you do not know the reason, even the Masters of computer proficiency will be overwhelmed, headaches unceasingly. Here are some of the most commonly encountered notebook failures, and provide a detailed solution to

Help readers to solve problems calmly.

Ⅰ. The reason for the intermittent start of the portable computer fan

notebook computer without running any program, the system fan will rotate intermittently, about 5 seconds, then stop 10 seconds, and then turn 5 seconds, cycle.

In fact, this phenomenon is normal, because the laptop in order to save power consumption, its cooling fan is not always working, but when the internal temperature of the notebook reaches a certain degree, will start cooling, so also caused the time when the stop phenomenon.

Ⅱ. Why does a portable computer start slowly

My notebook has recently had a very strange fault, the performance is: After the power-on hard drive lights flashing, 5-6 minutes to enter the system, the system after the system unresponsive, the view process is known as system (not system Idel process) processes occupy resources 99% resources,

The size of the 268KB~272KB,CPU fan on (this machine is a temperature-controlled fan, usually play CS half an hour to start), after 15 minutes or so to return resources system Idel Process, the system returned to normal. The latest version of Jinshan Poison PA found no poison, no other suspicious process, Skynet surveillance

There is no suspicious connection. Is my machine a virus or a Trojan? or a system failure? According to what you say, it should be a system failure, most likely an unknown virus program is affecting your system. The ideal solution is to back up the important data first, and then

Format the system's partition and reinstall the operating system so that your computer will be back to normal. In addition, the general notebook computer will bring the system recovery disk randomly, but the use of recovery disk will restore the system to the factory state, may cause data loss, so

Please use caution.

Ⅲ. The heat dissipation problem of notebook computer

In the computer, the CPU is a big fever, the faster the CPU, the more power consumption, the more calorific value. Generally used by the heat dissipation method is mainly rely on the heat sink and fan. On the bottom and upper part of the motherboard, each has a metal radiating plate. In the position of the CPU, there is a system to assist the cooling

To absorb the heat generated from the CPU. The cooling fan has no start, low air volume and high air volume of three files, depending on the CPU temperature. The biggest benefit of this heat dissipation method is that it is low cost, so it is accepted by most PC manufacturers.

In addition to this commonly used heat dissipation method, the keyboard convection cooling is also a very creative way. We know that the notebook computer is very thin, when the keyboard installed on the host board, the keyboard and the bottom will contact with the motherboard, just can use the bottom of the keyboard to the CPU generated heat transfer

Export to. In the construction of the keyboard, each button has 4 holes, the heat is discharged through the key hole, when the hot air from the key hole discharge, cold air from the key hole inflow, to replace the hot air. www.bcua.cn Bcuablog

Among the many heat dissipation technologies, the water cooled bulk heat pipe technology is a very effective heat dissipation technology proposed by IBM. The original idea came from the scoop of an ice cream spoon, the heat of the hand through an empty tube leading to the frozen ice cream, which can be dug up after being softened. Cooling

The tube has fiber and liquid heat conduction medium (mostly water), after vacuum, a piece close to the CPU, the other end away from the CPU. Its working principle is: under the vacuum state, the boiling point of the liquid heat conduction medium is very low, if a section of the pipe is heated, the medium will evaporate, will heat

Take it to the other end, cool it and then flow back, so repeatedly, the heat is constantly taken away. The advantages of heat pipes are many, without mobile parts, there is no noise, no electricity consumption, and can work for a long time effectively.

In addition to IBM's thermal heat pipe technology, there are more characteristics of Toshiba notebook computer cold, hot plate cooling technology. Thermal efficiency increased by about 6.5 times times, so that the problem of notebook computer cooling is effectively resolved. At present, many brand-name notebook computers have adopted the heat dissipation tube

, keyboard convection cooling, temperature-controlled fan three cooling mode.

There is no software to directly control the operation of the laptop fan, but through the HTL instructions can effectively reduce the calorific value of the CPU. WINDOWS2000/XP has built-in support for the HTL directive.

Ⅳ. Notebook Optical Drive failure

Notebook optical drive The most common fault is mechanical failure, the second is the circuit fault, and the fault in the circuit by the user to adjust improper fault caused by the failure of the components more than the damage, so in the dismantling or maintenance of optical drive equipment, do not casually adjust the notebook CD-ROM drive

Department of various potentiometers. Notebook optical drive common failures are mainly three types: operating failure, contingency and inevitable failure.

1. Operation failure such as driver error or improper installation caused the notebook optical drive not found in Windows or DOS, notebook optical drive connector or jumper error makes the portable optical drive not available; The CD cable is not connected so that the CD cannot be heard, and the portable optical drive is not properly placed on the pallet causing the light

Drive does not read the disc deformation or dirt caused by the screen is not clear or pause or mosaic phenomenon is serious;

2. Accidental failure of notebook optical drive random fault, such as in-machine integrated circuits, capacitors, resistors, transistors and other components of early failure or sudden damage, or some frequent movement of mechanical parts and components of sudden damage, such failures are rare, but must be repaired and

Replacement to be able to troubleshoot, so contingency failure is also known as the "true" fault.

3. The inevitable failure of notebook optical drive after the use of a certain period of failure, mainly include: laser diode Aging, reading disk Time to become long or even can not read the disc; the optical lens in the laser head assembly is dirty or poor performance, resulting in audio or video distortion or panic; mechanical transmission

The moving mechanism is caused by abrasion, deformation and loosening of the fault.

What needs to be explained is that the maintenance rate of the inevitable failure depends not only on the quality of the product, but also on the user's artificial operation and maintenance and use of frequency and environment.

Ⅴ. Other faults

One, do not add electricity (power LED does not light)

1. Check that the external adapter is properly connected to the notebook and that the external adapter is working properly

2. If the battery is the only power supply, check whether the battery model is the original battery, whether the battery is full of electricity, whether the battery is installed correctly

3. Check the DC board is normal

4. Check and repair the motherboard

Second, the power indicator light but the system does not run, LCD also does not show

1. Press and hold the power switch and continue for four seconds to turn off the power supply and reboot to check for normal boot

2. Does the external CRT monitor display correctly?

3. Check that the memory is securely plugged in

4. Clear CMOS Information

5. Try replacing memory, CPU, charging board

6. Repair the motherboard

Third, the display of the image is not clear

1. Check to adjust the brightness after the display is normal

2. Check that the display driver is installed correctly and that the resolution is suitable for the current LCD size and model

3. Check the LCD connection with the motherboard is correct; Check that the LCD connection is properly connected to the LCD

4. Check the backlight Control board work is normal

5. Check the motherboard on the North Bridge chip is cold welding and virtual welding phenomenon

6. Try to replace the motherboard

Four, no display

1. Through the status indicator to check whether the system is in hibernation, if it is dormant, press the power to open critical wake-up

2. Check whether the external monitor is connected properly

3. Check whether to add power

4. Check the LCD connection between the two ends of normal

5. Replace backlight Control Panel or LCD

6. Replace the motherboard

V. The battery charge is not recognized in Win98/win me

1. Verify that the power management function is started and set correctly in the operating system

2. Charge the battery for three hours before use

3. Charge and discharge the battery two times in Windows 98 or Windows Me

4. Replace the battery

Six, touch board does not work

1. Check for external mouse access and use mouse test program to detect whether normal

2. Check the contact board connection is correct

3. Replace the touch pad

4. Check the keyboard control chip whether there is cold welding and virtual welding phenomenon

5. Replace the motherboard

Seven, serial equipment does not work

1. Check whether the serial port is set to "ENABLED" in the BIOS setup

2. Use SIO test program to detect whether normal

3. Check the serial device is connected correctly

4. If it is a serial mouse, check to see if the built-in trackpad is turned off in the BIOS settings, check whether the serial mouse is recognized in the Windows 98 or me Device Manager, and check that the serial mouse driver is installed correctly

5. Replace serial equipment

6. Check the motherboard of the South Bridge chip is cold welding and virtual welding phenomenon

7. Replace the motherboard

Eight, the mouth equipment does not work

1. Check if the port is set to "ENABLED" in the BIOS setup

2. Use PIO test program to detect whether normal

3. Check that all connections are correct

4. Check whether the external device is powered on

5. Check that the printer mode settings are correct

6. Check the motherboard of the South Bridge chip is cold welding and virtual welding phenomenon

7. Replace the motherboard

Nine, the USB port does not work

1. Check that the USB port is set to "ENABLED" in the BIOS setup

2. Reseat the USB device to check if the connection is normal

3. Check the USB port driver and USB device driver installation is correct

4. Replace the USB device or contact the USB device manufacturer for technical support

5. Replace the motherboard

Ten, the sound card work is not normal

1. Use audio detection program to detect whether normal

2. Check the volume adjustment is correct

3. Check whether the sound source (CD, tape, etc.) is normal

4. Check whether the sound card driver is installed

5. Check the speaker and microphone connection is normal

6. Replace the sound card board

7. Replace the motherboard

Xi. fan problem

1. Use fan test program to detect whether the normal, on the boot fan is normal

2. Whether the fan line is plugged in well

3. Fan is good

4. Whether the m/b part of the connecter is welded well

5. Motherboard issues

12, keyboard problems

1. Use the keyboard test procedure test judgment

2. Whether the keyboard line is plugged in well

3. m/b part of the Connecter whether there is a needle skew or other undesirable

4. Bad motherboard

Classification of software failures

13. Driver Class

1. The display is not normal

2. The sound card does not work

3. Modem,lan cannot work

4. QSB cannot be used

5. Some hardware cannot be used properly because the driver is not loaded or the driver is not loaded correctly

14. Operating System class

1. Operating system speed slows down

2. Sometimes freezes

3. Model does not support an operating system

4. Not normal shutdown

5. Sleep freezes

XV, Application class

1. Application conflict causes system panic

2. The application causes the system not to shut down properly

3. Application conflict results in normal use

Common notebook no boot failure repair

The notebook is not able to boot can be said to be a common fault, so that the laptop can not boot what is the reason? According to the author in the Notebook repair center for many years of experience, the common reasons for the failure of the following several main causes.

1. Battery damage, when the battery is damaged, will cause no boot, at this time as long as the battery removed, put on the external power supply can be used normally

2.BIOS Refresh failed or in the virus, repair the difficulty is also relatively large, to remove the BIOS, and then put it on a dedicated device to write again.

3. Power supply board problems, caused by a lot of reasons for the power supply board problems, such as fuse burning, control chip burnout, and so on, because the power supply board chipset chip is relatively fine, repair has a chip has a certain degree of difficulty, so many maintenance centers are recommended to change a new power board

In fact, in the notebook maintenance process, most of the power supply part of the problem, and the power part of the problem is to first check insurance, sometimes, really very useful.

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