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
Tag Archives: acer keyboard
Instructions to buy laptop power adapter
As a family of books , is an important accessory power adapter , power adapter when purchasing everyday , we will always meet original and non-original price difference is more, this time on how to choose? This article will briefly introduce our Things to know when the optional power adapter . In looking for your help .
Tools / materials
Computer power adapter of the same nominal voltage, output current of the power supply voltage adapter can pass the same , the output current is different, can not be used on the same books . The basic principle is that a large nominal current of the power supply can replace a small nominal current of the power supply. Estimated that someone would think so , I feel great nominal current of the power will burn the books , because the current big thing. In fact, much the same voltage current situation depends on the load , Oh, think of junior high school physics know . When the books when the high-load operation , the current bigger, when the books go into standby , the current is smaller, a large nominal current of the power supply has sufficient current margin. Conversely, someone with 56w 72w power supply instead of using them is also no problem , because the power adapter is usually designed to leave a margin , load power must be less than the power supply , so this instead of general use is feasible, but the rest of the power headroom rarely , once you pick up a lot of books peripherals, such as two usb hard drive, then cpu running at full speed , then there is a base, a CD-ROM drive at full speed to read the disk , plus the same time charging the battery, estimated to be dangerous , you should feel free to feel power is not already boiled eggs. So it is best not to use a small electric current instead of high-current power supply .
Laptop no sound how to do?
First check the sound card driver , right-click My Computer – Properties – Hardware – Device Manager – Sound video and game controllers – right click – ReaItek – update or scan , uninstall reinstall . ( If no driver package to download Driver Genius – Driver Update – voice, video – to start the update – asked for the appropriate driver – Restart the computer )
2 Commissioning microphone : Control Panel – High Definition Audio Configuration – Mixer – replay – a small wrench – Select – OK – the right to pull > it – Rear pink In – play X mute, the rest of the full push up ; such as a microphone plugged on the front panel and then hit X mute the microphone volume , and then point the audio I/O– small wrench – Select disable front panel jack detection – OK – returns mixer – recording – a small wrench – Select – OK – Click on the microphone volume ( version inconsistencies need to play X mute the stereo mix )
(3) strengthen the microphone: Right-click the bottom right corner of a small speaker ( small speaker volume pushed ) – Adjust Audio Properties – Volume – Equipment Volume – Senior – ( master volume full push to ) – Options – Properties – microphone volume tick – OK to return to options – Advanced Control – senior – microphone strengthen the hook.
4 lower right corner of the small speakers display method : Start — Settings — Control Panel — Sounds and Audio Devices — Volume – ( tick ) the volume icon in the taskbar.
5 pages without sound methods of operation: open web – Tools – Options – Advanced – ( tick ) Play sounds in Web pages .
6 Game headphones sound great way to : Control Panel — High Definition Audio Configuration – Audio I/O– headset – choose 8CH Speaker .
7 front panel jack debug : Control Panel – High Definition Audio Configuration – Audio I/O– simulation – Rear Panel – Tap Jack icon – which you insert the device ? ( Need to plug devices such as plug headphones ) – Select Headset – OK, so
8 Using QQ chat language when you can not adjust the volume of MIC , please download the patch .
9 If the sound card driver is not installed on Solution: Control Panel – Administrative Tools – Services – Windows Audio – startup type is set to “Auto” and then start it.
10 registry modification method :
I. Start – Run – type regedit to open the registry, in order to open the HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows \ CurrentVersion \ Run In the right window of its new string “Systray” ( on the right point in the Run New ) key ( in Double-click on the Systray editor ) as “c: \ windows \ system32 \ Systray.exe”, win2000 system was “c: \ winnt \ system32 \ Systray.exe”
Second Start – Run – type regedit to open the registry, in order to open the HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ WindowsNT \ CurrentVersion \ Drivers32 create a new string value named “wavemapper” value “msacm32.drv”. Restart the computer .
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 .