How to Troubleshoot a MacBook Boot Problem

Disconnect any external devices and peripherals from the computer. Press the power button. If there is no response, proceed to Step 2.
Locate the small battery meter on the left side of the MacBook where the ports are located. Press the small button to the left of the LEDs. If they do not light up, the issue may be a dead battery. Connect the computer's power supply and press the power button. Proceed to Step 3 if the computer does not boot up.
Disconnect the power cable and wait a minute before reconnecting it. Press the power button. A small LED on the tip of the power cable should light up when connected. If not, remove the plug and check the power port for debris or dust. Gently blow air into the port and into the plug connector and reconnect it.
Hold down the 'Command' key, the 'Ctrl' key and the power button at the same time for three seconds. A chime or tone should emit from the computer before it starts up. If not, proceed to Step 5.
Press the power button and immediately hold down the 'Command/Option' key, the 'P' key and the 'R' key at the same time until you hear at least two instances of the chime or tone.
Disconnect the power cable and turn the laptop over if it still does not turn on. Remove the battery. On early 2009 and older MacBooks, locate the coin-slot locking mechanism and turn it with a coin until the battery pops up. On mid-2009 onward MacBooks, remove all of the backing screws and lift off the back. Locate the battery and use the pull tab to lift the battery out of the compartment.
Hold down the power button for five seconds after the battery is removed. You should hear a long tone that lasts a few seconds. Replace the battery and power supply and press the power button once more.
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How to Take a Screen Shot With a MacBook

Have the content that you want as a screen shot centered on your screen. Press the 'Command-Shift-“4.” The cursor becomes a crosshair.
Move the cursor to the corner of the screen where you want the picture to start.
Click and drag your mouse to select the content for the screen shot. A selection rectangle appears in the area you define. To adjust this rectangle keep holding down the mouse key as you proceed through the next steps.
Move the selection rectangle as needed by pressing the space bar and moving the cursor. The rectangle follows this movement.
Resize the rectangle around the selection center as needed by pressing the “Option” key and move the cursor. The rectangle resizes.
Constrain the selection rectangle as needed by pressing the “Shift” key while letting go of the other keys. Moving the cursor horizontally constrains the vertical size and vice versa.
Release all the keys, including the mouse. The screenshot will appear on the desktop with the name “Picture” and a number, such as “Picture 1.”
Double-click on the screenshot so you can open and inspect it.
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How to Replace a Macbook Screen (6 Steps)

Drain the battery, turn off your MacBook and disconnect it from any and all external power sources.
Remove all screws from the outside of the computer with the Phillips head screwdriver. Lay them out in a pattern that will allow you to put each individual screw back into its original location.
Remove the keyboard assembly and internal hardware of the computer. The system board is located directly underneath the keyboard and must be separated first. After the system board is out, proceed with the keyboard. This requires more unscrewing and may involve the disconnection of one or two delicate cables. Remove the screws slowly with your phillips head screwdriver, and remove the cables softly with your fingers. The exact number of screws and cables will depend on your version and generation of MacBook.
Disconnect the display cables connecting the screen to the motherboard. Use your plastic putty knife to gently lift up the top casing holding the screen into place. Remove the screws around the screen, and disconnect the cables at the bottom of the screen from the plastic part of the MacBook that connects with the bottom half. Remove the screws on either side of the screen holding it to the brackets, there will be two or three on each side. Remove the sleep magnet on the left side of the screen. Remove the screws from the top, and carefully remove the tape from the back of the screen. Separate the miniature webcam and remove the old screen from the side brackets.
Install the new screen. You will go through the exact same process as before, but in reverse. Place the new screen in the same position as the old one, place the brackets around it, replace the webcam and tape down the wires. Replace the screws into the brackets and the sleep magnet on the left side. Secure the screen into the top casing and proceed with reassembly.
Reassemble your MacBook. Install all components exactly as they were.
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How to Design an iPhone Game (7 Steps)

Go to the Apple Developers website to confirm your computer and operating system are compatible with the development software. Read through the site to familiarize yourself with the Apple Developer Program. While the tools can be downloaded for free, you have to enroll in either the Standard Program or Enterprise Program to distribute your games through Apple's App Store. Both programs require a fee to join, but they provide the necessary development resources for testing and distribution.
Sign up to become a registered iPhone developer to proceed to download the tools.
Download the iPhone SDK (Software Development Kit) with Xcode IDE. The Apple site also has downloads available for the interface builder, compilers and shark analysis, as well as frameworks and samples.
Download the iPhone simulator. Use the iPhone simulator to test the program you are building on a virtual iPhone interface on your computer.
Familiarize yourself with Objective-C programming language. Prepare to do a lot of reading. While doing so, experiment with your development tools to understand the way things work.
Take extra care in debugging and error-proofing your software. Try to break your programs when you test them. Perform unusual game play. Touch screen game play, while principally similar to standard mouse game play, opens up possibilities for innovation as well as for critical errors. Not only is careful programming necessary, but seeking problems and conflicts trains you to think ahead and become a more efficient programmer.
Join forums and learn from your fellow developers. If you are stuck on a problem, seek the help of the iPhone programming community. Stay active in the forums to open possibilities that you have not previously considered. Keep at it and don't give up.
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How to Make Folders on My iPhone (6 Steps)

Update your iPhone to iOS 4 or greater. Connect it to iTunes using the USB cable, and select your iPhone in the left column under 'Devices.' Look in the center of the iTunes screen for the Software Version. If it is not up-to-date, you must select the 'Update' button and proceed to update the operating system on your iPhone to the latest available version.
Press and hold your finger on any app on your iPhone touch screen. You will see the apps on your device all start to shimmer and a small circle with an 'x' will appear in the upper left corner of the apps you have installed on the device.
Press and hold your finger over any app on your screen. While holding your finger on the screen, drag the app icon over the icon of another app. You will see that the two apps are now enclosed within a folder.
Rename the folder from the generic name that the iPhone provided. You will see a line where you can edit the name of the folder. Tapping on any folder while you are in editing mode will open and show the contents, including the name of the folder. Touching anywhere on the line with the name will allow you to edit it with the virtual keyboard.
Remove an item from a folder by simply touching and dragging it out of the folder while you are in editing mode, when the app icons are all wiggling.
Press the home button on the bottom of your phone to exit out of the home screen edit mode. Once the app icons stop wiggling, you will know that you are out of edit mode.
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