Laptop keyboard can not be used solutions

First, why not use the keyboard
Computer keyboard can be said to be in daily use, contact one of the largest interactive devices and users, often the kinds of problems now, the keyboard can not be used in a wide variety of phenomena often bring problems to users. Let the user to use, you may encounter the keyboard can not be used to analyze the phenomenon.
1, the cable can not be used Keyboard

Keyboard keyboard cable break will cause intermittent failures
Many users daily use, you will find all the keyboard keys suddenly invalid, the keyboard status lights go out at the same time along with key failure. Users move the keyboard, or the restart after the keyboard and can return to work. This phenomenon can not be the main reason for the keyboard, the keyboard cable is often repeated bending or aging, causing internal cable breakage virtual access, such as a strong player ability, you can try to replace the keyboard cable to resolve.
2, the main failure resulting string key can not be used

Master chip failure resulting string key phenomenon
User process, we will encounter the phenomenon of serial key can not be used. After the performance for the user to press a key, the key input response of other keys. For example, press the "A" key, "B" letter, which is due to the internal keyboard controller chips, code libraries caused problems. Manufacturers can re-flash the firmware to fix string key phenomenon. Ordinary users can not repair themselves. If the failure is still under warranty keyboard, you can point to a repair maintenance and replacement, if you have had insurance, only to re-purchase.
Second, the keyboard can not be used for reasons
3, a single keyboard can not be used

Film circuit fault is a single / multiple keys can not be the reason
Single keyboard can not be used, that will affect the user's daily use, letting users feel gesture. The Failure of the overall performance of using the normal keyboard, but the keyboard is a local one or more keys, there click unresponsive or intermittent failures. The cause of the problem, because the keyboard film conductive line inside a fracture caused by virtual access. Part of the hands-on ability of the player, you can use a multimeter to measure open circuit after the find, then use conductive paint or pencil repair. As for the average player, or directly replace the keyboard more peace of mind easy.
4, mobile phone leads to a keyboard can not be used

Poor quality of phone calls when the keyboard will cause interference
Users in the use of computers, may also find a very strange phenomenon keyboard can not be used. The symptoms manifested on the keyboard side of the phone to the phone, the keyboard does not use all the keys phenomenon of. The problem is mainly due to inadequate internal keyboard shielding design. Phone when the phone is turned on, the wireless transmitter power increases, will cause some electromagnetic radiation, shielding the internal keyboard design is bad, it will interfere with the normal use of the keyboard, for this keyboard, or as early as possible to replace the players, in order to avoid daily use caused trouble.
Third, the driver causes the keyboard can not be used
5, driver exception causes the keyboard can not be used

Drivers can cause damage by viruses keyboard failure
V above, are due to a hardware problem or a design flaw caused by the product itself can not use a keyboard, viruses and software reason, will result in the phenomenon of the keyboard can not be used. Users discovery keyboard failure. View the device in Device Manager, you will find a yellow exclamation mark appears on the keyboard device. Some computer experts can accordingly by removing the registry key, and then reload the device to fix. But for most ordinary users, the problem occurs, the most easy solution is to reinstall the system (because the keyboard can not be used after a problem).
6, laptop keyboard does not work properly
Of course, for laptop users, the most common keyboard failure is the most common phenomenon is that the letter keys on the keyboard is pressed, the playing out not correspond to the letters, but a bunch of numbers, a phenomenon that so many novice users headache . The reason, in fact, because between the user inadvertently open the keypad on the keyboard.

Printed on the right side of the laptop keyboard buttons with yellow numbers
Because of the limited size of the laptop, the keyboard layout are compact, no separate numeric keypad. When part of the user will experience high frequency input digital use. Computer manufacturers to address this phenomenon, using an ingenious solution, the design part of the button on the right side of the keyboard into a tilted numeric keypad, and then add one other key combination to achieve by FN button keypad open. Just find the laptop user on the keyboard printed with NumLock key, then press together with the FN button, you can reset the keyboard.

Laptop battery power measurement methods

Laptop battery is used, the less the more normal? To explain this, you have to talk about the structure of the battery itself. Before we understand the basic structure of the battery, notebook batteries and battery is composed of management chip. Batteries that store electricity "warehouse", power management chip is able to calculate and manage the charging and discharging process. The main element in the functioning of batteries is lithium, which is a dynamic element, in order to protect the security, can only exist as ions in the battery. Lithium batteries similar shape with ordinary batteries, laptop batteries, but do often occur in groups. We often see the "four core", "six-core" refers to the battery in the battery is the number of batteries.
Batteries and more, means that capacity is large, the number of high-capacity batteries battery is generally about eight. The reason comes to batteries group, because a group of batteries is the battery charge decrease the "culprit." Batteries batteries each group, its quality and discharge levels vary. After discharge, in order to maintain voltage stability, management chip detects that a worst batteries charging protection. Often the past, the entire battery power naturally will gradually decrease. This phenomenon can be used after the battery calibration function, this function can be balanced multi-cell battery burden "work."
It should be mentioned here have battery power measurement methods, common approach four kinds, but in general are integrated several methods used in one of the main methods for calculating manner calculated to achieve the remaining auxiliary power calculation and management.
Open circuit voltage measurement
This method is by measuring the battery voltage value in the stationary state to calculate the remaining capacity of the battery, but because the relationship between lithium ion battery voltage and remaining capacity of the still between the non-linear, and therefore the measured value of this method is not accurate the vast majority of cell phone batteries have adopted this method of calculation.
Coulomb calculation
This method is by measuring the battery charge and discharge current, the product of the current value and time value are calculated by integrating the battery after the charge into the charge and the release of electricity, Coulomb calculation method is a more accurate power calculation.
Impedance measurement
It obtain residual capacity value of the battery by measuring the internal resistance of the battery.
Comprehensive look-up table
By setting a related table, voltage, current, temperature and other parameters input, you can check to get the battery's remaining capacity.
But no matter which method, while charging management chip follow the "bucket principle" to the status of the worst batteries subject to protection. Therefore regular correction can protect the battery cells to some extent, to extend the overall life of the battery.

Hard to build software RAID speed

Software RAID, as the name suggests, is through software simulation way up RAID system requires no special hardware support, and without BIOS support. And the formation of hard RAID, you need to use RAID card or onboard RAID chip to achieve, only a few high-end gaming or desktop PC with this feature.
Because software RAID does not require specialized hardware and BIOS support, so almost all installed Windows XP or higher operating systems can be set up in the laptop system, because the operating system from Windows XP era, disk management tool provides a soft RAID function, and the formation process is very simple, does not involve too much for hardware changes. Also in the set up, the system on the hard drive capacity is also no special requirements, this is the same as RAID and hard. There is only a cost: a need for additional mechanical hard drive, such as a laptop hard drive is idle.
Formation of a simple risk-free
Software RAID can achieve RAID0, RAID1 and RAID5 disk mode, etc., and in the same system, we can use more than one hard disk partition, two hard drives of different partitions were formed into a RAID0 or RAID1 mode, which is hard RAID mode can not be achieved, since the entire hard drive hardware RAID must be fully integrated into the system in order to begin to form, especially in RAID0 mode, you must first complete the formation to begin installing the operating system. Of course, reflected in terms of stability, it is much stable than software RAID.
On Windows systems, RAID0 mode is called the striped pattern, it has the best performance; RAID 1 mirrored volumes were referred to as the model, with the best security. Of course, to speed, we sure it is set up RAID0, is striped. As for the formation of steps that can be simply summarized as three steps:
The first step: to install a hard disk in the drive position
Since the formation of soft RAID0 need to use at least two hard drives, so we can use the laptop's optical drive to expand, the method is very simple, to tear down the existing drive, with the optical drive bay hard disk conversion, the new installation of mechanical hard disk installation to drive bit. Need to remind everyone that the current hard disk drive bit 12.7mm and 9.5mm converter bracket has two thicknesses available, we need to purchase for their own laptop thickness optical drive bay hard disk conversion.
Step Two: The hard disk to a dynamic disk
As follows: Right-click on "My Computer → Properties → Disk Management" in Disk Management, right-click interface to convert the hard disk - the first is the original main hard drive, select "Convert to Dynamic Disk" option that appears to ignore "Unable to enter the operating system," the warning, the original hard transition from the basic model to the dynamic mode, if you have that you do not need to convert a dynamic disk mode. Using the same method to add an extra hard drive also convert incoming dynamic hard drive.
Here we may be worried about the system and data security. Actual situation is: we will be equipped with a hard disk Windows7 operating system after the conversion to a dynamic disk, partition, and data were intact after the restart can also enter Windows7 operating system again. But to be safe, we still recommend that you back up important data before proceeding.
In conclusion, if your system has been installed with an operating system, is able to carry out the formation of (repeat: the best backup data) without losing data are available, but the process is irreversible.
Also in the transformation process, we also found that some Windows7 operating system has been installed in the laptop hard drive can not be converted from a basic disk to a dynamic disk, right-click on the hard drive would not appear this option, then the only way is to reinstall the operating system, and the system comes with Windows partition tool partition after installing can be converted.
The third step: the formation of RAID0 mode
At this point in the disk management interface, right-click on the following a mechanical hard drive, select "New striped volume" command and select the other, a dynamic disk, select it and follow the instructions step by step operation can be. Need to remind everyone that, and set up the same way as hard RAID, striped set up after the success of capacity, the total capacity of the two partitions of two times the minimum capacity. The formation of such capacities are two partitions 931.41GB and 280.11GB, then the new partition size after the formation of soft RAID0 was generated 560.22GB.
Hard to build software RAID speed
The highest performance increase of 77%
From the test results, we will set up two hard drives become a "striped (RAID0)" mode, the hard disk read speed has been greatly improved. With the fastest 1TB mechanical hard, for example, after the formation of striped, hard AS SSD BenchMark random read speeds up to 172.86MB / s, relative to the previous speed 100MB / s or so, the performance improvement is obvious, but in the Fastcopy other tests and test projects, have been greatly speed growth, especially in the small 500MB file transfer tests, the striped 117MB / s transfer rate 77% higher than 1TB hard drive 69.27MB / s in growth.
Performance and hardware RAID close
To give you a more intuitive understanding of the performance difference between software RAID and hardware RAID, we have a laptop in a unified hardware and software platform, using laptop comes with hard RAID function was tested using the same software used in two RAID hard disk formation.
As can be seen from the test results table, and RAID0 hard compared to soft RAID0 did not show a distinct disadvantage, at least from the perspective of the prototype we tested the answer is true. In the four projects we tested, the soft RAID0 two projects are ahead of hard RAID0, especially Fastcopy test project multiple small files, RAID0 hard behind the relatively large magnitude of gall.
Editor: Idle hard to realize the value of a good choice
About Software RAID, this is not a new topic, before we tested on DIY platform by utilizing three disc set up soft RAID. But for the purposes of laptop platform but few people involved, because in the past there is little laptop will have a hard RAID functionality, so we can not evaluate the effect of soft RAID set up on the same platform. But by the above tests, the results of some presumably contrary to all expectations, soft RAID also received not less than hard RAID performance, so if we qualified, we can also try to verify this on many more platforms.

How laptop power?

Users want mobile office with a laptop, it is most worried about is the laptop's battery is not enough, what skills make laptop batteries last longer in Win7, change what settings win7 laptop to let it use up more power, the following to see how to set up Win7 for laptop battery last longer.
1, the energy consumption of free resources
When a computer starts, not always running at full load condition, so there will be a lot of idle time, idle time, power consumption has become an important power management technology. In win7, the idle power consumption is effectively improved after a certain period of time the hardware does not work it will enter a low-power state has to save battery power. Including CPU, hard drive, memory and network elements have adopted this technology. For example, a full power run power 35w of the CPU power consumption at idle is almost 0, only this one will be able to save a lot of power.
2, Bluetooth devices to improve power
When win7 detected Bluetooth devices in a low-power state, they will be temporarily closed, or "selective suspend."
3, increased processor power management
win7 incorporates the latest in power management technology, which enables Windows 7 to dynamically adjust CPU performance based on the current load conditions and performance requirements.
4, low-power audio
win7 will support Intel's low-power HD audio specification, which allows encoding *** into low power state. win7 also supports selective suspend technology to shut down idle equipment, such as microphones and cameras such USB devices.
5, through the trigger to start the service
System services are typically started at system boot time together, and then wait for the call resides in the background. In Windows 7, the service is only part of the system is triggered by some event will start, such as inserting a device or change IP. This can reduce the number of services in the long-running background processes.
6, adaptive display brightness adjustment
Microsoft said, usually without the operation, the display will automatically turn off in 10-15 minutes time. But there will be no more short-term operating conditions in actual use, in order to better energy efficiency, this technology will reduce the brightness of the display. In addition, it could use some sensing devices to adjust the brightness according to ambient brightness of the display.
7, network equipment to improve power
win7 compatibility for wireless network controller in low power mode has been strengthened, and only in the device supports low-power wireless AP mode is enabled only. Vista because it can not detect in advance whether to support low-power mode, it will lead to a sudden interruption of the wireless network connection. win7 will prevent this from happening, before entering a low power mode will first detect the wireless AP support this mode.
8, integrated timer
Currently processor by utilizing spare time gap processing instructions to save energy, but most free time saving techniques require a certain length in order to obtain energy savings. And this technology by making the Windows kernel originally terminated and focus more dispersed multiple timers at the same time, the processing is completed in a short time, thus increasing the idle time of the processor. In addition, when using the battery in the laptop case, win7 will reduce the frequency of non-critical activities daemon.
The above is win7 several important improvements in power management, compared to the previous system can save more energy. After the above through improved laptop battery life has been extended under certain Win7.

Pregnant women with a computer 12 major considerations

Computer disease, every day working women are the guard, not to mention the pregnancy? Pregnant women need to pay attention to what use a computer?
1, pregnant women have access to computers weekly time is not more than 20 hours
To prevent pelvic blood retention caused by prolonged sitting poor, so that a degree of relaxation; pay attention to the level of the computer and the sitting position with the seat, so that the healthy development of the fetus.
2, pay attention to rest, to prevent the tendon strain
Prolonged use of computers will lead to finger joints, wrist, arm muscles, shoulders, neck, back and other parts of soreness and pain, so pregnant mothers at work an hour later should rest for 10 minutes, or do work between the parade.
3, pay attention to eye health
Eyes and presentation, the distance between eyes and the screen should be maintained at 50 cm or more, the best use of light depending on the viewing angle of 20 degrees. Work, radiation protection should be applied in the face and hands and skin oils.
4, long engaged in computer operations pregnant women should eat plenty of fresh vegetables and fruits. While increasing vitamin A, B1, C, E intake.
To prevent corneal drying, eye dryness, decreased visual acuity, or even night blindness and other computer pregnant women should eat more foods rich in vitamin A, such as soy, fish, milk, walnuts, vegetables, cabbage, tomatoes, spinach and fresh fruit. Vitamin C can effectively inhibit oxidation. The main role of vitamin E are: lower cholesterol, clear body waste, prevent cataracts. Walnuts and peanuts are rich in vitamin E. Vitamin B1 can enhance nerve cell nutrition, relieve nervous tension.
5, the bubble point of green tea a day
Tea LPS, can improve the body's blood work can be. Body after injection of LPS, in a short time you can enhance the body's non-specific immunity. Tea can also radiation damage.
6, in order to avoid reflective screen or unclear, the computer should not be placed on the side or rear windows.
Ambient lighting should be soft, if there are windows behind the operator should draw the curtains to avoid direct exposure to light on a bright screen image reverse cause eye fatigue.
7, the computer room and often ventilation
In the indoor fan or air conditioning installation, reduce bromine than dibenzofurans impact on the body, the computer room near the dust density than a hundred times higher than the other space, which for a long time attached to the skin, can cause various types of skin diseases. Computer room to keep clean, the computer should be regularly cleaned.
8, most people blink less than 5 times per minute would dry eyes
A man working on a computer at the blink of an eye and only one-third the usual number of times, thus reducing the secretion of eye lubricants and enzyme. Should blink every hour to let the eye rest at least once.
9, the computer room light to fit
Not too bright or too dark to avoid direct exposure to light on the screen caused by interference of light. Studio ventilation to keep dry.
10. To use the filter on the computer screen
To reduce visual fatigue. Preferable to use high-quality glass or plastic filter.
11, to keep the skin clean
Computer screen surface there is a lot of static electricity, which can be transferred onto gather dust face and hands exposed skin, a long time, prone to rash, pigmentation, severe cases may even cause skin lesions and so on.
12, to adopt the correct typing posture
Correct typing posture on the health of the body parts of the body plays an important role, suggest that pregnant mothers typing a closer look at their posture is correct, if you have a long day sitting in front of the computer, then give some bad posture Your body has brought great harm.
You may wish to prepare for a long time working in front of the computer, choose the right equipment, seated posture, bring more comfort for your body, reduce the incidence of various Yin Ji. Love yourself a little more each day, it will make your body better, with more stamina to meet the challenges of work and better bear breeding mission. We passed summarize, summarize the following principles, I hope we can develop good habits!
1, the screen and keyboard should be directly in front of you, you should not let the neck and wrists that oblique state.
2, the top of the screen should be lower than the level of your eyes, and because one of the least distance from the screen of your arm.
3, to sit on the sit up straight, do not sit Bantang half. Do not let your body sitting posture angle errors.
4, should be kept in the front thigh is parallel arm posture.
5, hands, wrists, and elbows should be kept on the straight line care. No that is not the bend.
6, feet should be flat on the floor can be easily or pads.
7, the height of the seat should be adjusted to your elbows bent almost 90 degrees, and your fingers can naturally shelf just above the keyboard.
8, if the chair itself is not designed to protect the back curve, you'll buy a protective back pad. Remember to keep the waist to the back of the curve. Office staff are now sitting on a chair for too long, regarded as a lifestyle diseases. If you sit crooked it worse.

How to prevent computer radiation damage to the skin

Drinking green tea can prevent computer radiation
Computer radiation not only harmful to human health, but also affects the quality and efficiency of the work. For life is stressful and busy people who resist the computer radiation easiest way is to drink 2-3 cups of green tea in the morning, eat an orange. Tea is rich in vitamin A former, it is absorbed by the body, can be quickly converted into vitamin A. Not only synthetic vitamin A rhodopsin, but also make the eyes in the dark light, see things more clearly, therefore, green tea can not only eliminate the computer radiation hazards, but also to protect and enhance vision. If you are not used to drink green tea, chrysanthemum tea can also play against the computer radiation and regulate bodily functions.
Help you reduce computer radiation
Technical staff, said the computer radiation is inevitable, but it can be reduced. First, you should buy as new computers, generally do not use old computers, old computers radiation are generally more powerful, at a distance, the same conditions of similar models, typically 1-2 times the new computer. Operate a computer screen when the best in computer security a special color filter panels to reduce the radiation hazards, indoor loitering metal objects should not be placed in order to avoid the re-emission of electromagnetic waves. When using the computer to adjust the brightness of the screen, in general, the bigger the screen brightness, electromagnetic radiation is stronger, the smaller the contrary. However, it can not be stressed too dark, so the brightness is too small to affect results, and could easily lead to eye fatigue. Also keep an appropriate distance from the screen. Closer from the screen, the greater the body suffered electromagnetic radiation, so good is half a meter away from the screen.
Computer radiation damage the skin, used computers should wash
Computer work is increasingly becoming essential supplies, dermatologists has reminded, when the daily operation of the computer, be sure to wash after using the computer. Physical and computer screens should be kept at least 70 cm distance as possible.
The amount of radiation produced by the computer screen, although small, but over time will continue after damage the skin, prone to facial pigmentation, slack skin around the eyes, crow's feet, eye bags and dark circles. City Dermatology Hospital experts advise frequent computer users, especially women, in the front of the machine is best to apply some protective equipment, such as such as Cream or foundation. At the same time, it is best to use the computer screen protection. After using the computer, it is best to wash your face regularly. Because for a long time in front of the screen, the skin is also prone to excessive secretion of oil, dust accumulation and so on. Before going to sleep, the computer runs more need for timely clean skin.
The maximum radiation damage in computer keyboard
Do you often feel heavy head or memory loss it?
Tummy sleep time to remember to shut down the computer, not just turn off the screen only. Because only turn off the screen can not prevent radiation, and we are tummy sleeping, head directly into the computer, the day had Alzheimer's disease or brain tumors too late.
Computer used to sit at the table for you, whether it sit for several hours and incorrect posture, always feel inexplicable neck and shoulder pain, and even the motivation to work? You may now be a quiz, you looked to the left direction, and then head down slowly bend 45 degrees, action to do here, your neck and neck and shoulder pain is not normal to feel? Given the above symptoms, you have to be careful, because you probably got the modern computer diseases of civilization - "thoracic outlet syndrome."
Do you know the amount of radiation a computer is?
A keyboard 1000V / m
2, mouse 450V / m
3, the screen 218V / m
4, host 170V / m.
Therefore, when you use your computer and enjoy the fun of the Internet, please be careful

Computer radiation and women's health
Today, a large number of professional women to enter management, business, finance, telecommunications, services and other agencies dealing with the computer, according to the information, computer operators are mostly women, half of them for women of childbearing age. As well as television, video, audio, computers, copiers, refrigerators, vacuum cleaners, microwave ovens, radios, mobile phones, cordless phones, power transmission lines, etc. All electrical appliances generate electromagnetic radiation, and electromagnetic radiation has on human health has far-reaching Jeopardy! A full range of computer has changed the lives of women, but also a full range of influence female fertility, beauty, health aspects.
1, pregnant women should pay attention to electromagnetic radiation
Last year, the World Health Organization in the latest amendments to the computer screen and work-related health problems noted in some of the computer screen work environment factors that may affect pregnancy outcome, recent studies have shown that pregnant women more than 20 hours per week using computers, the abortion rate increased 80 percent, while also increasing the birth rate deformed children. Sweden last year to become the strength of more than 0.2 micro tesla harmful low frequency electromagnetic fields of the world's first officially recognized.
2, the effects of electromagnetic radiation on beauty
During the interview, many of the recent close contact with VDT staff complained of facial brown spots increase. Professor Jin Xi introduction of foreign materials VDT operator repeatedly referred to the skin may appear red blood rash, was a line string-like, sometimes manifested as erythema or eczema symptoms similar to face-based, women and more. 1998 International Journal of Epidemiology reported: electromagnetic radiation cause female endocrine disorders are the main breeding ground for a large number of melasma.
3, electromagnetic radiation leads to psychological pressure and communicative incompetence
Meanwhile, according to an authoritative new study funded by IBM and other large companies announced several staff computer networks tend to become more withdrawn, irritable, difficult to close and communicative incompetence. Professor Huang also pointed out that miscarriage, brown spots, etc. are also closely related to psychological factors.
Somewhat affected computer radiation on the human body, but there is no standard can be based on, but note the following points can effectively reduce the radiation, some errors can avoid wasting money.
1, Shibao Ping is simply psychological comfort, and now have a CRT monitor radiation anti-static coating, you can hand in front touch display screen, no crackling static, but to no radiation is recommended to choose the LCD screen.
2, the host chooses the better brands such as Lenovo, with only relatively thick chassis, the interface has a radiation seal seams tight, placed under the table.
3, ground to rest, is a good idea to wash your face.
4, Cream and sunscreen absolutely no role, Cream is to prevent dust substances, sunscreen to prevent UV, did not prevent the radiation component, without having to spend time and money, but in the interior coating or some sunscreen to prevent UV refraction, Sunscreen can only play the role.
5, and now more and more electronic devices society, do not live so scared, even without a computer watch TV Yeah, there are many kinds of radiation in the air, do not worry too much.