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The power adapter is usually higher than the original non-original power to okay?

Theoretically . Original power certainly better, but the actual use may not feel the difference. Usually we have a safety device input voltage range , such as a 2.5 mobile hard disk , it is plus or minus 5% requirement 5V , too high or too low, the protection circuit will stop the device work. If the protection circuit is activated, it means that before this, your machine has been close to or exceeded its design can withstand the upper or lower limit , which is the life of the machine are influential . ( Of course , non-original power mentioned here , or good workmanship , poor quality products , do not mention it. )
The more important question may be the books of data security, automatic protection of a sudden stop working for a computer is a terrible thing , especially a lot of friends without the battery . Sometimes inexplicable restart the computer , and this is also relevant .
1.3
For the original power supply , the manufacturers are aware of their power needs much load capacity , calculated from the nominal voltage and current security certainly far more accurate .
However, if the use of non- original equipment adapter , such as general-purpose transformers and the like, these issues can not be taken seriously , this is the user can only try to think of ways to get from the power supply parameters are compatible , but the internal resistance of each adapter is different, nominal voltage tolerance may be different, the nominal output voltage variation range of the current may also vary if you are not careful measurements of the relevant values , certainly , there is a risk

Computer keyboard failure a solution how to do the computer keyboard can not be used

Heck, many computer novices friends would ask me how the failure of the keyboard ? Not press the number keys on the keyboard , or the failure of part of the keyboard keys . Around these more common computer keyboard failure , computer white matter , editor skies rain system for everyone to be introduced , so that we can identify the cause of the failure of the keyboard as well as solutions .
Keyboard failure have more variety , here are some common keyboard failure phenomenon and solutions.
A : the numeric keypad on the keyboard failure
This is the lowest level error will often make a lot of new friends , usually large desktop keyboard , causing the keyboard numeric keypad ( 0123456789 ) failure of most of the key reasons is that we closed the numeric keypad , you can see Numlock key is turned on , the corresponding there is a light above the numeric keypad , press the Numlock lights above the key that opens the numeric keypad.
Some notebook novice friends often ask why I’m right part of the letter keys laptop keyboard is indeed break out numbers instead of letters, very tangled ! In fact, this is because the numeric keys and alphabet keys laptop binding exists , when opening the numeric keypad, letter keys are arranged on the right part of the number keys , mainly because of less laptop keyboard , the intelligent switching factory settings . Solution is as follows :
If only the keypad is locked , then press and hold the fn + Numlk key to switch to , and vice versa. There are some new friends often do not know the wrong letters playing out all uppercase letters , this is because the key function opens the uppercase letters , canceled only need to press the “Caps Lock” key to switch to normal.
Two : part of the keyboard keys on the keyboard failure, this is no regular key failure
Key failure caused by keyboard part , this situation is most computer keyboards internal circuit board failure , this phenomenon is usually because the circuit board or conductive plastic on the dirt , which makes it impossible to properly switched between the two. Other factors are also possible, such as: keyboard plug is damaged , line problems, damage to the motherboard , CPU is not working properly , etc., but not the main reason. The former you can try the following methods to resolve them, and the latter is generally related to computer failure or malfunction keyboard is not the scope of this .
1 . Disassemble the keyboard. Note that when you open the keyboard , be sure to button surface ( that is, we operate side ) down , board up , otherwise conductive plastic may have come off on each key , giving you repair trouble.
2 . Open circuit boards, circuit boards are generally made ​​of soft plastic film , buttons engraved with cable , with a concentration of more than 97 % alcohol cotton ( 75% of medical alcohol cotton can, because I had used , but the most good cotton with a high concentration of alcohol ) and gently scrub two times on the circuit board . For key failure to take care of part of the line a few times .
3 . View key failure conductive plastic parts , if the above accumulated a lot of dirt , then use the same alcohol scrub. Assuming conductive plastic is damaged , then I suggest that you can not commonly used conductive plastic buttons on the change to the damaged part , although this “shattering ” initiative not allow the keyboard to play out all the features , but the most At least you can extend the life of common keys.
4 . Clear the keyboard in the corner of the dirt , tools available brush, small brush , etc., but pay attention to some of the action should be gentle .
5. Check whether the module is soldered or welded sealing off , if you make the electric iron , it can repair welding work . Of course, this procedure applies only to make the electric iron on a friend , the friend will not be used , skip this step.
6. Installed keyboard. One thing to note here that we have to wait and then be clean and the alcohol evaporates . The best computer configuration network

If the above methods can not be resolved , we can then try to use what method of investigation :
Modify keyboard driver : Open through the ” My Computer” System Properties , select the Hardware tab : Open the Device Manager, we found that under Chinese Windows XP operating system , the default keyboard driver is the “standard 101 / 102 key or Microsoft Natural PS / 2 keyboard . ”
1 Right-click and select Update Driver Hardware Update Wizard appears : Select ” Install from a list of specific location (Advanced ) ” and click “Next “, select ” Do not search I will choose the driver to install. ”
Click “Next” to enter the ” Select install this hardware device drivers ” on page remove the check box ” Show compatible hardware ” before the tick . In the ” Standard Keyboard Model ” column select click “Next ” pop-up ” Update Driver Warning ” point ” is .” “Confirm Installation ” window continues to point ” is .”
2 . Complete the Hardware Update Wizard. Restart the computer.
Modify the registry : Click the “Start” menu , click ” Run”, type “regedit”, open the registry, enter “HKEY_LOCAL_MACHINE \ SYSTEM \ ControlSet001 \ Control \ Keyboard Layouts”, there are many children , I have found through observation , to ” 0804 ” at the end are Simplified Chinese input method. Open the “E00E0804″, can be seen on the right of children there “Layout File” subkey, double-click to open the item , the ” Value data ” in the “kbdus.dll” to “kbdjpn.dll”, ” OK” available . And so on , can be all to ” 0804 ” at the end of the subkey “Layout File” all changed “kbdjpn.dll”, will be chosen specifically according to their common input method. Then restart the computer just fine !

If the above methods do not solve , then it may be a hardware failure, the most common hardware failure is the keyboard , the keyboard inside the wrench is oxidized , resulting in disconnection , etc. , we can try another keyboard , the vast majority can solve the problem, of course, there are very few emerging since the keyboard plug is damaged , circuit problems, damage to the motherboard , CPU is not working properly , these we need to take the place of professional service under specific detection .

When buying used laptops , in addition to pay attention to the power supply and monitor the situation , you should also pay attention to what ? First , the screen detection software .

We want to buy a laptop screen no dead pixels , the display is not normal fuzzy , often with the naked eye is difficult to determine accurately , so we need to use the software .
We recommend hand laptop screen detection software are : Nokia MonitorTest finished version .
This software is easy to use and powerful. Installation instructions above can be
Second, detection of cpu software.
We recommend Intel Processor Frequency ID Utility:
It can be the actual frequency of the CPU bus frequency and other information to make a comprehensive test. We can through the use of power and battery are the same CPU frequency to determine what type of CPU machines , and if it is consistent with the frequency of a desktop CPU, and vice versa is a mobile CPU.
Third, the memory test
DocMemory Diagnostic: so-called ” memory doctor” It allows almost all of the problems of memory betrays itself , the PC 95% failures caused by the memory of this software can be captured . In addition it can do the aging test memory. Because it needs to boot from the floppy drive , the way we can check the floppy drive, although now with almost no floppy drive .
Fourth, the hard drive detection
We recommend hd tune v2.52 hard disk tools
Fifth, battery testing
BatteryMon 2.0 laptop battery excellent detection capabilities so that we breath, we think it detects the battery invincible , we have to use the convenient, search finished version to download.
We recommend BatteryMon 2.0 Chinese version
BatteryMon software to graphically allows us to visually see the various performance parameters of the battery. After loading laptop battery disconnect external power supply, after running BatteryMon Click “Start” button in the plot can be seen falling curve of battery power . Where the vertical axis represents the current percentage of remaining battery charge , the abscissa indicates that the battery usage time . For more information on the left , “Total time” means the software to test out the maximum time that can be used when the battery is fully charged .
Sixth, the graphics test.
We recommend 3DMARK
3DMARK version of a series of simple and clear user interface and fair and accurate 3D graphics test process more and more people ‘s favorite to win in the past year , 3DMark03 surpass sales of 20 million copies , more than one million of online data submission results fully proved 3DMark software leader in this field.
Seventh, CD-ROM detection
We recommend NeroCDSpeed4.01 Edition
NeroCDSpeed ​​this software , the current version of the NeroCDSpeed ​​already is a comprehensive CD-ROM drive performance test software that can test a lot of important data on CD-ROM and CD-ROM drives. For example, drive transfer rate , seek time , CPU usage and disk material , up to speed, capacity .

 

Keyboard selection tips

What needs to pay attention to the selection of keyboards , what types of keyboards ?
The keyboard is now available in the market can be divided into desktop keyboard , laptop keyboard , industrial keyboard , Sulu keyboard, dual-control keyboard , ultra keyboard six categories. So in the end how to choose for your own keyboard it? Here’s what to say .
Connection
There wired connection type and wireless type . Like the general office , play games and select cable type , wired keyboard connected to a computer , there are two : USB and PS / 2. Now a lot of people like the wireless keyboard , do not let the table because there is no line accident , or think the appearance is to force, but the need to install a wireless keyboard battery , if you want to play the game or office , that’s a lot of power ! Choose the best power-saving automatic power-off function when the keyboard is a good choice .
Designs
Designs are a girl like me very concerned about here is not just talking about the appearance of the color of it , there is a small keyboard shape, knife , smoothness, and so on. So choose waterproof , ultra-thin keyboard is also a popular market , which is characterized by a key way short, quick response, and generally occupy a small space , very delicate !
Overall structure
In general , the keyboard can be divided into full keyboard , 60 percent keyboard, with columns Japanese , French with columns , gamers series. Each has its own specific purpose , this with personal habits , like there are a lot of big series . So , different people , different cultures , different purposes , and finally select the keyboard is not the same . They differ mostly in the primary key of each zone bottom line . Alt, Ctrl, Win, Fn,, how much order.
Sense of touch
1, in the tone of the keyboard when you can take a look by hand , listening to the sound size and feel of a keyboard under every sense of touch by going after .
2 , pressure grams , this value generally refers to the pressure needed to press the key number of grams , usually from 35g ~ 60g are, feel the impact of this value is quite large , of course, there is the pressure curve .
The choice of materials
Keyboard keycap material selection is critical , the main material of relatively good ABS, POM, PBT three, including ABS cheapest, but long-term use is easy to shine. Three materials in the performance feel all have their own characteristics , in general are good.
1, ABS: keycap most common materials, petroleum associated index of 100 ! ABS chemical name for acrylonitrile – butadiene – styrene plastic , is one of five synthetic resin.
2, PBT: expensive keyboard materials, petroleum associated index 40 ! PBT chemical name is poly (butylene terephthalate) , is made through the mixing process milky translucent to opaque , crystalline thermoplastic polyester resin.
3, POM: super wear light-colored keyboard material , petroleum associated index 20 ! POM POM chemical name , English name :. Polyoxymethylene (Polyformaldehyde POM is a side-chain , high-density, high-crystalline linear polymer .
Personalized keyboard
Now personality is really very high atmospheric keyboard on the grade ! There are many keyboard concept , we are looking forward to have a listing of which God hurry ! Backlit keyboard , transparent keyboard , ultra-thin soft keyboard , keyboard pattern shape , even some metal keyboard , for those of us pursuing appearance appearance association is definitely too cattle friends.
Volume size
The volume sizybe keoard but I fully understood , because usually used to the laptop keypad, switch to desktop keyboard is not suited , large keyboard , and has become accustomed to playing finger keypad, often the wrong word , this time Select a small desktop keyboard , it would be too easy

By Application

 

Applications can be divided according to the desktop keyboard , laptop keyboard , industrial keyboard , Sulu keyboard, dual-control keyboard , ultra keyboard six categories.
By nature symbols
According to the nature of symbols can be divided into alphabetic keyboard and numeric keypad into two categories. Dual USB keyboard , a keyboard can control two computers , a key for 2 seconds to switch quickly and easily. Classified according to the principle
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1 . Mechanical keyboard (Mechanical) using a similar metal -contact switches , the working principle is to make
Contact on or off with a simple process , noise , and easy maintenance.
2 . Internal plastic membrane keyboard (Membrane) keyboard is divided into four , achieved without mechanical wear. Which is characterized by low prices, low noise , and low cost , have occupied most of the market share.
3 . Conductive rubber keyboard (Conductive Rubber) contact is connected through the conductive structure of the rubber . Internal keyboard with a layer of conductive rubber bump charged , each key corresponds to a bulge, while pressing the following contacts connected . This type of keyboard is a transitional product market by a mechanical keyboard membrane keyboard to . 4 . Non-contact capacitance keyboard (Capacitives) capacitive switches using a similar principle , the distance between the electrodes causes the capacitance change to drive change through the encoder button . Feature is no wear and tightness better.
Classification by text input
Press text input while hitting the number keys can be divided into one-touch input keyboard , double and multi-key input keyboard input keyboard , now we used the keyboard are touch input keyboard, Sulu keyboard is a multi- key input keyboard, the latest in the four are double input method keyboard input keyboard.
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Conventional classification
Conventional keyboard has mechanical buttons and capacitive buttons two kinds. IPC keyboard in the film there is a touch of the keyboard keys . Mechanical keyboard is the first structure to be adopted , the general principle is similar to metal contact switch is turned on or off to make contact with the process is simple , easy maintenance, the general feeling , noise, wear characteristics , most inexpensive mechanical the keyboard uses copper spring as the elastic material , copper , easy to break and easy to lose elasticity , the failure rate increased use over time , and now has basically been eliminated , replaced by a capacitive keyboard . It is based on capacitive switch keyboard , the principle is the distance between the electrodes to generate the change of capacitance is changed by the key , allow the temporary formation of shock pulse condition . Theoretically this switch is a non-contact non-contact , wear rate is negligible even minimal , there is no bad risks , with low noise , easy to control touch, you can create high-quality keyboard , but the process than the mechanical complex structures . There is also a keyboard for the IPC to be completely sealed membrane keypad with touch only for special occasions.

• How to maintain laptop keyboard ?

 

·         Notebook has now become essential to our daily life and entertainment office terminal equipment, and laptop keyboard naturally become one of the parts in contact with us for the longest time , also the most prone to problems of ” high incidence of accidents .” Now teach you how to care laptop keyboard method .

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You will need to
• Computer Cleaning Kit
• 1, when the accumulated dust on the keyboard , use a small brush to clean the cracks , or use the camera lens is usually in high-pressure jet cleaning tank , blow the dust .
• 2, clean the surface can be coated with a little cleaner on a soft cloth , in the case of gently wipe off the keyboard surface.
• 3, is prohibited in the computer , eat, or drink , especially not to eat and drink side edge to operate a computer , it is neither detrimental to the health and computers .
• 4, try not to stay long fingernails , long-term use may scratch the keyboard .
• 5, if you play the game , please note that the intensity of the keys , do not too much , considering the life of the issue , some of the frequencies used in the game to set the height of the key turns to a different location on the keys .
• 6, notebook and desktop keyboards keyboard , after all , need to care for the use and maintenance , can not be used in case of a individual keys , you can add a USB keyboard.

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7, the case if you need a keyboard or removable keycaps , not sure of the best expertise to assist .

HP Laptop Keyboard Problems

Key Failure

Single keys may fail due to repeated use or abuse. The expected life of an HP laptop keyboard is comparable to the life of the computer. This period can be as long as the user needs it to be; as long as the computer is well-maintained and treated with a reasonable degree of gentleness, all of its components should last for a long time.

Regular cleaning of the keyboard should keep the keys working correctly. If a key or keys stop working and cleaning fails to make it work, the keyboard will probably require replacement.

Driver Failure

A “driver” is a piece of software that controls how your computer’s hardware works, software being a program, and hardware being a physical component of the computer. The computer’s keyboard requires a driver to operate. If that driver is removed, or was not installed properly, the keyboard can stop working properly.

Check the status of your computer’s keyboard driver by accessing the computer’s Device Manager. The driver status should be indicated under the Keyboards heading of the hardware list.

Connection Failure

If there is no apparent problem with the keyboard driver, there is a possibility that the cable that connects your keyboard to the motherboard has somehow become disconnected. This is rare, and it could be a result of damage to the keyboard or the motherboard. It’s certainly possible for the connector mounted on the motherboard to have become damaged if the computer has a history of overheating.

If the cable has become disconnected, a technician may have to examine the computer. The keyboard connections in laptop computers are delicate and can be damaged easily if the user does not know how to work on them.

Expert Insight

Keys can be difficult to snap back onto the keyboard, even for technicians. If you are having difficulties reattaching a lost key, do not attempt to force it.

Drivers are fairly simple to download and install. A link to the HP laptop keyboard Driver Download website is in the Resource section. At the site, you will be required to provide your computer’s model number in order to find the correct software.

 

HP Laptop Keyboard

HP Laptop Keyboard is made from the highest quality parts, the HP Keyboard are tailored made according to the original size, whether the Keyboard appearance, size and quality are the same as with the original.

HP Keyboard Repair and Replacement

Are you considering HP Keyboard repair? HP Laptop Keyboards replacement on this particular model is very easy and takes just a few minutes. Here is a quick HP replacement Keyboard repair tutorial with step-by-step instructions.

Once you have purchased the new keyboard, all you need to replace the old with the new is a screwdriver and something plastic, flat and thin like a credit card or guitar pick.

Step one: Remove the two screws from the bottom of the computer that are holding down the HP Laptop Keyboard bezel. The bezel is the bar that sits right above all the function keys.

Step two: Turn the computer over, open the cover and insert the credit card or guitar pick between the bezel and the computer screen. The bezel has pegs that sit in holes, you need to slowly pry up the bezel. It will make a bit of a popping noise as it is removed.

Step three: Now hold on to the HP Keyboard from the end closest to the screen and gently pull it away from the touch-pad end and flip it over. You will see the ribbon attached to the underside of the keyboard. There is a little plastic connector holding the ribbon to the computer. To unlock it, carefully pull up on the two tabs; one located on each corner of the connector. Be very gentle when you do this as this is the one part that gets broken the most often when changing a keyboard. The ribbon will now be released.

Step four: Carefully pull the ribbon out of the connector and remove it along with the entire HP Laptop Keyboard.

Final step: To insert the new HP Laptop Keyboard, place the board face down so you have easy access to the ribbon. Make sure the keyboard is lined up so when you flip it back over the keys are in the correct position. Keep the ribbon straight at all times; twisting it could damage it. Place the ribbon in the connector; it only goes in one way. Once in place, push down on the connector tabs to lock it. Now flip the keyboard over and slide it down toward the touch pad and take the bezel and line the pegs up with the holes and push it in place. Then turn the computer over and replace the two screws you removed from the bottom. You can now power on your computer and see if the keyboard works. If it is not working, more than likely the ribbon was not inserted properly.

Common Failure Points for Laptop AC Adapters

Laptop AC adapters are an important component of any laptop. Without them, users will be left without power or the ability to recharge the battery. Since AC adapters are an external part, however, they can often take a lot of abuse, leading to failure. Here we will examine some of the most common failure points for laptop AC adapter. 

Without a doubt, the most vulnerable parts of a Laptop AC adapter is it’s cables. Most designs incorporate a thin cable connecting the laptop to the transformer, and then a thicker cable from the transformer to the wall outlet. The thin cable is often the most susceptible to damage. It can get bent sharply, wrapped too tightly, or even kinked or knotted, causing damage to the cables inside. When this happens, there will often be a short in the cable, causing intermittent problems. Some Gateway AC Adapters utilize a 90 degree curved adapter plug that minimizes the stress on the connection at the laptop and many aftermarket ac adapters include this feature. In some cases, wiggling the cable will cause the adapter to work again temporarily, but it is recommended that it be replaced to avoid any risk of electric shock.

Another common failure point for AC adapters is the connectors. There is often a connector between the AC cable and transformer, and another where the DC cable plugs into the laptop itself. This connector is often fairly small by necessity and prone to damage over time as the user continually plugs and unplugs the connector. In some cases, the internal connector of the laptop can also become damaged, so it is a good idea to determine which part is defective before replacement.

The transformer is contained within the large “brick” part of an AC adapter. It is less likely to be damaged than other components because it is designed to be rugged. Nevertheless, repeated dropping or other types of abuse can sometimes cause the adapter to malfunction, and it will need to be replaced.

When you have determined that your AC adapter needs replaced, you can visit an online retailer and search for your model to find a replacement part. You can also try doing a more general search, like Dell Laptop AC Adapter or one that pertains to your brand of laptop.