Goals: in the Windows XP operating system, a set of replicated shortcuts by [Ctrl + X] key can be cut, press [Ctrl + C] key can be copied, press [Ctrl + V] key Goo . Many users know. But is there another group Copy shortcuts, some users do not know.

Operating skills: another group copy shortcut, press Shift + Delete] key can cut, press [Ctrl + Insert] key can be copied, and press [Shift + Insert] key can be sticky. This shortcut is mainly suitable to control the mouse on the left hand, right hand control keyboard users.

The masses of users in the process of the choose and buy a notebook, is usually focus on the performance of the laptop, weight, battery life, etc., and for the keyboard seems to be few takers. Laptop can't use the keyboard to do, encountered such a problem is very trouble, notebook keyboard cannot be used for several reasons, water or is not installed will be caused. Keyboard market survey report shows that the keyboard is the most commonly used is the main input device, often enter code, edit documents or indulge game would be over. People rely on clothes horse depends on saddle, a design excellent keyboard that let your finger a cool to the end.
 
Notebook computer keyboard can't use?
 
1, laptop keyboard cannot be used may be a BIOS Settings inside the usb or the rid_device_info_keyboard, to accidentally closed, open the Settings, or restore the factory Settings of the BIOS directly, save the resume;
 
2, laptop keyboard cannot use notebook motherboard chip driver or usb chip driver not installed, use the laptop comes with driver CD, or "drive life" update driver software, networking, can.
 
Notebook computer keyboard cannot be used, the notebook keyboard full solution
 
1 key travel
 
Refers to use finger to press buttons nature can sink when distance, notebook computer keyboard keys of the process average is about 2.50 ~ 3.0 mm. And this is closely related to the M-6800 keyboard height, and then affect the thickness of the machine. Key travel longer benben brings to the user access to a desktop keyboard, if the key is shorter process, users will feel from time to time under the keyboard more hair acerbity, prone to fatigue. The length of the key travel mainly by keyboard bracket height and effective compression resilient rubber.
 
2 the springback
 
Refers to a button when a keystroke keyboard resistance generated by the feeling that it has a strong relationship with key travel, travel is moderate, the magnitude of the rebound is also very comfortable, not crunchy feeling, both such reasonable cooperation to bring users the most comfortable grip.
 
The 3 key from
 
The distance between two adjacent keys on the same position. It is a key factor determine the keyboard. A desktop keyboard keys from general is about 19 to 19.5 mm, so the keys of the distance is also known as "a full-sized keyboard.
 
Four key cap
 
Is everybody hand typing the keyboard on top of that square. Its material and shape can affect the user experience. The lettering on the keyboard keys printing process is good or bad will directly affect the key cap is beautiful and the wear-resisting degree of the handwriting. Many keyboard in order to ensure the perfect touch, keyboard can use printing technology, but the keyboard after long-term use of the word may be ground off. If the user is not sensitive for printed keyboard text, fully consider using keyboard stickers such products to guard the keycap, very convenient.
 
5 floor
 
The underside is a keyboard, a solid floor is essential to a good keyboard.
 
6 ergonomic keyboard
 
Keyboard market research, according to ergonomic keyboard on a standard M-6848 keyboard, fingering provisions left key and the right key areas around these two plates separately, and form a certain Angle. Separation between keyboard can relax the user's hands and wrists are, in a state of nature. This can prevent and alleviate wrist muscle strain. A good keyboard with human body engineering design, fully considered the needs of the human body, for friends, often use a keyboard is also very important, it can directly reduce the fatigue of our implement operation more convenient, more comfortable.

Under the Windows XP lock down the computer method and user login the cancellation of the way. In the "control panel - user account", the choice of task "change user login or cancellation of the way" appeared after the interface with two buttons: "use welcome screen" and "use fast user switching" (the meaning we can see its interpretation). The two buttons set mode has 3 kinds:
 
1, do not use welcome screen (right now also cannot use fast user switching).
 
2, use only the welcome screen.
 
3, use both welcome screen and fast user switching use.
 
When installing the Windows XP, the default setting is 3.
 
According to the "user login or cancellation of the way" setting different, respectively introduces the lock screen method.
 
Set to 1: with Windows 2000 and Windows NT4.0 use method are all the same, the same interface.
 
Advantages: is the real "lock computer", in you lock the computer, other users (administrator except) can't use the computer.
 
Weakness: login before "welcome screen", need to input the user name; Does not support fast user switching.
 
Set 2: keyboard Ctrl + Alt + Del, in springs in the task manager select "shutdown" menu "lock computer".
 
Advantages: login before "welcome screen", and other advantages and set to 1.
 
Disadvantages: does not support fast user switching.
 
Set 3: at this time using a variety of methods:
 
Method 1: choose "start - > cancellation", then click "switch user".
 
Method 2: Ctrl + Alt + Del, in springs in the task manager select "shutdown" menu "lock computer".
 
Method 3: Ctrl + Alt + Del, in springs in the task manager select "users" TAB, and then select the current login user account, press the "disconnect" button.
 
Advantages: login before a welcome screen, support fast user switching.
 
Weakness: the lock is one account, and other users can through the other account to use the computer.
 
General method
 
Because now you use the keyboard are generally Windows keyboard (left Ctrl and left Alt key intermediate have a key on the Windows icon, generally called it Win key) so in addition to the above introduction of various methods, and a most convenient method, that is to use Windows shortcuts: Win + L. In any case, as long as according to Win + L, you can lock the screen.

Q: The computer keyboard input can not want to lose something. Just try to operate a few shortcuts, appeared symptoms. Enter any combination of letters, is a dialog box appears: Find XX Favorites xx. Even if it is only delete word editing, you can not enter any of the words or letters. Restart invalid; recovery, invalid; keyboard to find whether the not reset not mean that the computer can not use.

Analysis replied:

1) Estimated no big problem, do not rush to reinstall the system first, after all, is not simple. First find a keyboard plugged in how to try another, if normal is that the keyboard is broken, if that does not work, it may be the keyboard thing, do not think is a problem of the system. Try another input method.

2) check the keyboard which key stuck switching to other keyboard situation, then it would rule out the keyboard itself suggested positive because of this small problem out of battered it might a system disk get reinstall it.

3) before reloading system try stuff like input method conflict; If you reinstall the system still does not work, there may be the game itself card or Suman, if not that is compatible with your computer not good.

4) you try another keyboard to see if there is this problem not, if there Gateway keyboard is another computer keyboard is okay, if the line that you reinstall the system, if not you check the keyboard reason.

 

Laptop keyboard membrane elastic material is a polymer, known as the 21st century special molecular structure of the new environmentally friendly materials he has excellent physical properties, such as: high elasticity, wear resistance, high strength, tough-degree easy temperature ductility and excellent adaptability the outstanding biological non-toxic, waterproof, breathable, oil, water, mold resistance, temperature resistance, long-term flexibility in the range of -60 ? -200 ?, excellent physical properties of the decision dedicated transparent keyboard membrane can withstand a single bond of more than 3 million times tapping computer keyboard protective film 0.2mm ultra-thin design, for ordinary silica film BASF TPU thickness of 1/2, decided that he has a good feel, excellent the physical characteristics of the decision TPU keyboard protective membrane ultra-high transparency, almost imperceptible film on the keyboard easy to use, snug fit on the keyboard surface, without prejudice to any keyboard operation.

Computer keyboard protective film is used as the material of the keyboard protective film is more appropriate at an early stage, but it has not overcome the shortcomings: relatively brittle and easily pulled off to fit difference easily fixed. Keyboard membrane to withdraw from the market because of these shortcomings and relatively simple types of scalability and poor reasons gradually replaced Silicone and TPU composite keyboard protective film effectively overcome the defects of pure the TPU and pure silica gel! Keyboard film is specially designed for the specific model laptop keyboard keys layout keyboard with concave bad film.

Q: the projector connect the laptop to output image, how to do?

A: laptop external display device, there are usually four display output control.
Laptop LCD screen bright lit external display device
Laptop LCD screen bright external display device does not shine
Laptop LCD screen is not lit, lit external display device
Laptop LCD screen is not lit, the external display device does not shine

Solution: simply press the laptop keyboard function keys can be switched.
TOSHIBA (Fn + F5)
IBM (Fn + F7)
Compaq (Fn + F4)
Gateway MX6931 Keyboard(Fn + F3)
NEC (Fn + F3)
Panasonic (Fn + F3)
Fujitsu (Fn + F10)
DEC (Fn + F4)
Sharp (Fn + F5)
Hitachi (Fn + F7)
Dell (Fn + F8)

Q: projector output image instability, stripes fluctuations is why?

A: The the projector power signal source power signal is not common ground.

Solution: plug the power cord of the projector and the signal source equipment on the same power supply wiring board.

Q: What was the time of purchase, the projection effect is good, back using poor results, why?

A: issues often not machines. For example: the signal-to-noise ratio of the input source is not ideal: the poor quality of the projection screen, a direct impact on the projection screen.

Solution: Note that the source selection. Consulting buyer screen match the selection and purchase of machinery.

Q: projected image ghosting should be done?

A: The actions most cases due to the poor performance of the connection cable. Solution: replace the signal line (note the matching device interface)

Q: maintenance of an important part of the projector - how to clean the vent filter?

A: In order to ensure the normal operation of the projector, regular inspection and maintenance is essential. Clean the vent filter is one of the important work. If the projector ventilation filter is clogged with dust, will affect the ventilation inside the projector, and cause the projector to overheat and damage the machine. Any time, make sure that the ventilation filter properly covered. Every 50 hours to clean up the projector ventilation filters,

The clean-up steps are as follows (TLP4, 6 series, for example):

Unplug the power cord
Remove the ventilation filter cover: vent filter cover is located on the right side of the projector, you can pull up the vent filter cover
Clean the filter: use a vacuum cleaner to filter dust
Ventilation filters back cover tightly covered.

Q: projector should pay attention to the problem

A: Try to use original projector cables, wires.
Projector away from water or moist places.
Pay attention to dust, dust, dust measures can be taken after consulting professionals.
Projector away from the heat source.
Note the nominal value of the supply voltage, the machine ground and power supply polarity.
Not user serviceable and open the body, internal cable replacement parts to try to use the original accessories.
Projector when not in use, you must cut off the power supply.
The use of the projector, such as unusual, unplug the power first.
Note that using the first projector to cool down, and then unplug the power.
The movement of the machine to pay great attention, gently, transport attention to packaging, shock.

Q: after a period of time, the projector projection screen appears irregular spots?

A: The projector uses a long time, the cabinet will be inhaled dust, irregular (usually red) spots expressed as a projection screen.

Solution: In order to ensure the normal operation of the machine, you need to regularly by professionals machine cleaning, vacuuming, spots will disappear.

Q: The projected image is displayed as vertical lines, irregular curve phenomenon and how to do?

A: Adjust the brightness of the image. Check the projector's lens, look into the camera if it needs cleaning. Adjust the synchronization and tracking settings on the projector.

Q: use projector suddenly automatically power off, the moment boot and recovery, is how is it?

A: The general phenomenon caused due to overheating in the machine to use the machine overheating start the projector in thermal protection circuit caused by power failure. In order to make the projector is working properly, the temperature is too high to prevent the machine, pay attention to the use of the ventilation holes Do not block or cover the back and bottom of the projector. 

Laptop computers CMOS settings, but it is to enter the CMOS settings and the desktop are very different. When the laptop computer to boot, you press the Del key is to not enter the CMOS settings, many brands of laptop  computers, you can press the F2 keyboard key to enter the CMOS setup. This is mainly to see your host what is the BIOS, because different BIOS has different entry, but the laptop will boot screen prompts.

The following are the various brand laptop computer to enter the CMOS setup:

IBM laptop  computers to enter the BIOS: (cold boot press F1, the part of the new models can press F1) to start when you restart

HP laptop computer into the BIOS: (start and restart when you press the F2)

Dell laptop computer into the BIOS: (start and restart when you press the F2)

Acer laptop computer into the BIOS: (start and restart when you press the F2)

Compaq laptop computer into the BIOS: (boot to the upper right corner flashing cursor appears, press F10, or press the F10 at boot time)

Heat dissipation problems, has been the biggest bottleneck notebook computer technology, which is related to the notebook computer's stability, many unexplained grind because of heat dissipation problems to solve. And the method of heat more related to the laptop battery life. Poor cooling method, and will lead to battery power used in most of the heat, and shorten battery time.
 
The general cooling method nothing more than heat sink and fan, the two cooling method is the main benefit of low cost, and is therefore most of the manufacturer to accept. At present, the IBM ThinkPad notebook computers used by the cooling mode have: the keyboard convection radiator, SanReGuan heat dissipation and temperature control fan heat dissipation. The three methods to come loose hot effect is good, save electricity, but because the cost is higher, and only a few manufacturers use.
 
Laptop microprocessors although small, but the heat can be discharged a lot. Most notebook computer use fan heat dissipation. IBM ThinkPad notebook computer, around the central processor, level 3 cooling system cooling protection, will produce heat from the surrounding processor evenly distributed, won't cause somewhere in the temperature is too high, and save the power, to extend the service life of the laptop.
 
Level 1 cooling system: double SanReGuan system
 
The design concept, other manufacturers rarely used, double SanReGuan system consists of three parts: the double SanReGuan, double radiator panels and metal stent.
 
The first part: SanReGuan
 
SanReGuan is the latest cooling device, can effective heat conduction from one end to the other side. It more than 20 cm long, 0.5 cm in diameter, and there are fiber and water, pipe in vacuum pumping, close to the CPU at one end, and the other end is away from the CPU. It's the job of the principle is: vacuum condition, the boiling point of water is very low, if at the end of the pipe is heated, water evaporates, and the tropical to the other side, to the other side, cooling water, and then flow back, so repeatedly, the fever continued to move, like air conditioners principle. Its advantages are not mobile parts, all parts are sealed inside, don't need to consume the battery, and because it is completely sealed, so always effective.
 
Part 2: heat sink
 
The bottom of the motherboard and the upper, each have a piece of metal radiator panel on the CPU position, with help of cooling system, receive from the heat generated by the processor, and will it into SanReGuan, these high fever by SanReGuan, along the whole piece of metal radiator panels to conduction. Located in the upper part of the motherboard radiator panels, and the keyboard contact, heat will discharge from the keyboard.
 
Part 3: metal stent
 
In addition to double SanReGuan and dual radiator panels, and a part to heat source also contact, it is a peripheral interfaces of stents, is located in the computer, and air contact. So, we also use this metal, to the heat generated by the bottom of the processor, and through the back of the peripheral fitting conduction out.
 
Secondary cooling system: the keyboard convection heat dissipation
 
Laptop is very thin, and when the keyboard fitted to the motherboard, bottom keyboard will and the motherboard contact, then, just use the keyboard bottom will be generated heat conduction out processor. The keyboard is very big area, bottom formed from metal, hot keyboard spread through the bottom. The keyboard in structure, each buttons need four KongCai can accommodate, hot button hole through and discharge, as the hot air from the key hole from the cold air from button hole into, to replace the hot air.
 
Level 3 cooling system: temperature control fan heat dissipation
 
A double SanReGuan system and two pieces of large heat sink, already can effectively heat dissipation, ThinkPad 560 or even cancelled fan, is no fan of the rare on the market one of the model. So, unless the necessary time, fan should avoid to start. When all kinds of devices not effective heat dissipation, finally to start fan, a cooling fan has two gears: low air volume and high volume, fan speed of temperature and decide on the processor. ThinkPad battery time is very long, mainly because of its unique thermal radiation.
 
Laptop cooling system, and if the situation is not good, can make the processor produces high temperature in the machine and stay in the user to the bottom of the finger, boot time is too long, or even affect the performance of the machine. Therefore, in the choice of notebook computer, be sure to consider to laptops by cooling method.
 
As mobile electronic business tools, IBM ThinkPad notebook computer has the triple cooling protection, will only little power used to heat dissipation, so, the use of a long time, and not have to worry about accident when machine or the power shortage, so as to ensure user key application no risk at all.