computer screen darkener

1. Open the Keychain Access app on your MAC first, as shown in the figure 2. Next, click on the "Keychain Access-preferences" option in the menu bar, as shown in the figure 3. In the Keychain Preferences window, tick the "Show Keychain status in menu bar" option, as shown in the figure 4. Click the lock icon in the menu bar, then click the "Lock Screen" option to lock the screen. 5. Of course, i

　Reason Analysis: 1, there is a disk error or file error in Windows system partition. 2. The motherboard's SATA or IDE controller driver is damaged or improperly installed. 3, the computer has been virus, Trojan, rogue software and other malicious programs attack. Resolution Policy: 1. Perform a disk scanner to fully detect all disk drives to see if there is a disk error or a file error on the disk drive. 2. Reinstall the SATA or IDE controller

1, after investigation, this blue screen error code reason is: Code: 0x00000050 Reason: File already exists. 2, the general exception, the boot press F8 key, into the selection menu, into Safe mode uninstall problem-driven, delete, replace the problem system files. You can also use the up and down keys to select the last Known Good Configuration, and a carriage return performs a reboot to resolve the problem. 3, the same blu

The resolution in English is called resolution, which we call resolution in the mainland, and in Taiwan and Hong Kong, which is often called resolution. Resolution refers to the precision of computer screen graphics, that is, how many pixels the display can display. We know that the monitor screen is actually made up of dots, lines and surfaces of countless LCD d

In previous versions of Mac and iOS, recording an iphone or ipad screen operation was a slightly more complicated task. But with the advent of Yosemite, the method of recording screens on Mac computers for the iphone or ipad has become easier. Here is a detailed procedure:Preparation of the operating systemMac computer: Need to upgrade to Yosemite and the above version;iphone or ipad: Need to upgrade to iOS

Lenovo notebook computer WIN8 system boot black screen how to do? Solution: First, the hardware: power-on immediately choose to enter the BIOS to see if it will also be black screen, if also the black screen hardware failure. Second, the System file configuration: 1, first in the start of the black

My computer installed I,e10. After a few times on the blue screen, a blue screen on the open. Through the Golden Hill security guard repaired. 1, open Jinshan security guards, select Edit. 2, add system repair function. 3, with the system repair function first check. Make sure there are no other problems.

This article describes how to obtain the screen parameters of the client using php, including the width, height, resolution, and other parameters, the js method is used to obtain the client computer screen parameters and then return them to the server using Ajax. This article describes how to obtain the screen paramete

Today, the computer problem that Xiao Bian wants to talk about is also related to the graphics card. A friend mentioned that his own ghost Win7 computer using AMD graphics driver through a regular black screen, such a problem how to solve it? 1. First of all, we can try to upgrade the graphics driver, sometimes, because there is no upgrade of the relationship, w

use Asm.jar to project your Android phone screen to your computerSometimes it may be necessary to project some of the actions on your phone, such as the display of some app demos. In fact, there are specialized hardware equipment capable of this matter, but there is no need to specifically show a demo to spend money to buy hardware equipment. Just right, for Android phones, there is an open source jar package capable of doing this: Android

A crash is a headache for the operator. When the system crashes, the system cannot be started, the screen is frozen, the mouse and keyboard cannot be input, and the software is interrupted abnormally. Although there are many reasons for the crash, the root cause is never the same as hardware and software. 1. Hardware-related crashes [Poor heat dissipation]Monitor, power supply, and CPU are very hot at work, so maintaining good ventilation is very impo

Win7 Computer boot screen shows no signal how to do? Below, small make up a detailed introduction! 1. First of all, we need to make sure that the monitor is normal, if the monitor is normal, then it is possible that the data cable is in the wrong location, because some computers are dual graphics cards, there may be errors in the situation. 2. If it is a desktop

Computer blue screen How to use U disk Reload system 1, the system ISO image of the Gho files extracted to the U disk Gho directory; 2, in the need to reload the system computer insert U disk, restart press F12, F11, ESC and other keys, choose to start from U disk; 3, after starting from U disk, select "01" or "02" return, start PE syst

When the computer is working, sometimes the screen is jammed and when there is no response, how can we solve the problem? 1, our left hand hold the "CTRL" Key and "Alt", right hand hold "Del" key, three keys at the same time, will appear as shown in the following figure 2, we click to start Task Manager will see the image below, will show that our computer