How to Replace the Motherboard on a MacBook

Power down the Macbook. Turn the device over. Take out the battery from the bay. This is done by the pressing of the two catches on the battery's side. Now pull up on the battery. Use the Phillips screwdriver to take out the screws on the bottom of the battery compartment. Remove the compartment.
Flip the Macbook back to the right-side position. Take out the screws on the corners of the rear of the device. Now remove the remaining screws on the three sides of the Macbook. Lift the top of the computer up. The housing will now come off the computer.
Raise the keyboard. Move it away from the computer's body. You will now see the motherboard. Disconnect the orange cord that connects the keyboard to the motherboard. Move the keyboard to one side. Take off the two wires that connect the side of the motherboard to the computer.
Use the screwdriver to take off the yellow tape located on the motherboard. Detach the gold video cable from the motherboard. Utilize the screwdriver to take off the screws on the motherboard.
Raise up the motherboard. Pull out the motherboard's power plug. Now replace the motherboard with the brand new unit.
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How to Select Text on an iPad

Navigate to the text you want to select.
Touch and hold the text until a magnifying glass appears on top of the text. A blinking cursor appears where your finger is positioned.
Drag your finger to move the blinking cursor. Lift your finger from the iPad touchscreen to set the cursor in its current position. Selection buttons appear.
Tap 'Select All' if you want to select all the text. More option buttons appear.
Tap 'Select' to select only the word adjacent to the blinking cursor. Drag the blue dots of the highlighted word to redefine the selection area. More option buttons appear.
Select the 'Cut' option to delete the selected text. Select 'Copy' to copy the text.
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How to Remove the Keyboard in a MacBook (8 Steps)

Put the soft cloth down on a table. Close the lid of the MacBook and place it face down on the soft cloth. Turn the lock on the bottom panel to release the battery. Slide the battery out of the bottom and put it aside.
Use the Phillips jeweler's screwdriver to remove the three screws running across the long part of the 'L' shaped bracket inside of the battery compartment. Lift the 'L' shaped bracket up and out of the battery compartment.
Use the Phillips jeweler's screwdriver to remove the two screws, one on each side, at the end where the battery cable is located inside the battery compartment.
Lift up on the three metal levers in the battery compartment and remove the screws beneath each using the Phillips jeweler's screwdriver. Use the Phillips jeweler's screwdriver to remove the 2nd, 4th, 7th and 9th screws in the front of the battery compartment, counting from the left side.
Use the Phillips jeweler's screwdriver to remove the three screws from the bottom of the case; two at the back edge and one in the middle. Use the Phillips jeweler's screwdriver to remove the two screws on the outside of the case next to the battery compartment.
Use the Phillips jeweler's screwdriver to remove the two screws on the side of the case next to the optical drive. Remove the four screws from the back of the MacBook where the hinge is with the Phillips jeweler's screwdriver.
Turn the MacBook right side up and put it down on the soft cloth. Open the lid. Grab the back corners of the top plate of the MacBook from both sides. Wiggle the top plate loose.
Grab the top plate from both edges at the front. Slowly lift it up until you see the track pad cable's connector on the case. Pull the connector off the case. Remove the top plate and the keyboard from the case of the MacBook.
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How to Replace the RAM in a MacBook Pro (11 Steps)

Shut down your MacBook Pro. Remove the external cords, power adapter, Ethernet cable and any peripherals.
Allow your computer to cool down for 10 minutes if it has been on. The metal components inside the MacBook Pro can be hot to the touch.
Turn the computer over and open the battery cover release the latch on the computer's bottom. Push the latch in and pull it up. Lift the battery cover off.
Pull up on the tab on the back of the battery. Lift it up to loosen it, then pull it out.
Remove the four screws along the battery compartment with a size 00 screwdriver. Place the screws in a safe place. Remove the four screws near the hinge side. Make a note of where the screws go back into the body of the computer.
Lift the back cover off the computer and locate the memory module in the center of the computer.
Discharge static electricity from your body by touching a metal surface inside the computer.
Remove the existing RAM by pushing out on the retaining clips to release the first module. Remove the RAM, then release and remove the second module.
Hold the new RAM card at a 30-degree angle. Line up the notch in the RAM card with the tabs that are located in the memory slot. Slide the card into the bottom slot, then push down on the outer edge until it clicks into place. Repeat the process with the second module in the top slot.
Place the bottom cover back on and replace the screws into the holes, beginning with the hinge edge. Replace the remaining screws near the battery compartment.
Replace the battery and the battery cover. Close the latch on the back. Turn the computer over and turn it on.
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How to Replace a Hard Drive in a Macbook Air

Place the MacBook Air on a clean work surface, so that the bottom of the computer is pointing up. Remove the screws around the perimeter of the hard drive using the Phillips-head screwdriver. Lift the bottom of the case off the computer.
Locate the black cable running from the large black battery to the logic board. Lift it off the logic board carefully. Unscrew the battery from the case, using the Phillips-head screwdriver, and then lift it out of the case.
Locate the hard drive in the upper-left corner of the case. Locate the orange ribbon cable that goes over the hard drive. Pull the black pull tab that secures the ribbon cable to the logic board and lift the cable off the logic board. Pry off the ribbon cable connection from the speaker to the logic board, using the spudger.
Unplug the audio-out cable socket from the logic board, using the spudger, then pry the hard drive cable connector off the board, using the spudger. Pull the black cable, located above the hard drive, in the seam between the case and the drive, out of the case using the spudger, then remove the screw cover from the hard drive bracket, using the Phillips-head screwdriver. Unscrew the hard drive from the case, using the Phillips-head screwdriver, then lift the hard drive out of the case.
Push the hard drive out of the case, then pull the rubber shock isolator off the hard drive. Remove the ribbon cable from the hard drive, using the spudger. Install the ribbon cable into the replacement hard drive and install the rubber shock isolator around the hard drive. Push the replacement hard drive into the case with both hands. Reinstall the drive in the case with the Phillips-head screwdriver, then reassemble the computer in the reverse order of the disassembly procedure.
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How to Increase Memory in a Macbook (5 Steps)

Turn the computer over so that you can see the screws around the perimeter of the bottom of the computer. Remove them using the phillips-head screwdriver, then place them to the side. There are two different length screws, so make sure you keep them separate and note which ones go where.
Lift the bottom of the case off of the laptop at the vents near the back of the case, which will also release the two clips which hold it in place. Set the bottom of the case to the side.
Locate the ram in the computer. This is on the left side, just below a fan, and is about two to three inches wide. Push the tabs on either side of the ram away from the ram chip itself, which will pop up the ram. Pull the ram straight out of the socket. If you're installing two ram chips, repeat the process for the second layer of ram just underneath the first.
Push the replacement ram into the socket and push the clips onto the sides of the ram. Repeat this process with the additional piece of ram if you are installing it as well.
Place the bottom cover back onto the computer and reinstall the screws using the phillips-head screwdriver. Turn on the computer. If the ram is not installed correctly, you will get an error message right off the bat, so go back in and double check to make sure that it's installed firmly in the socket.
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