Samsung Galaxy Note 2 – how to disassemble note 2 – How to remove the case – How to remove the display

Samsung Galaxy Note 2 DISASSEMBLING PROCEDURE 

Grasp the end of the stylus and remove it from its slot in the midframe.

Pry with a plastic opening tool, or your fingernail, in the divot to the left of the rear-facing camera, near the power button.

Lift the rear case by the corner nearest the divot and remove it from the phone.

If you have an SD card inserted, use the flat end of a spudger, or your fingernail, to press the microSD card slightly deeper into its slot until you hear a click. After the click, release the card and it will pop out of its slot. Remove the microSD card. For reassembly, push the microSD card into the slot until it clicks in place.

Insert a plastic opening tool, or your finger, into the notch of the battery compartment and lift the battery upward.

Remove the battery from the midframe

Remove the eleven 4.0 mm Phillips #00 screws securing the midframe to the display assembly.Insert your plastic opening tool between the midframe and front panel assembly on the side of the phone. Slide the plastic opening tool down the seam.

Continue to run the plastic opening tool down the seam.

Carefully pry around the corner with a plastic opening tool.

Pry along the top of the phone with a plastic opening tool.

Push the plastic opening tool down to free the corner of the midframe from the display assembly.

Free the clips along the power button side of the phone.

Lastly, free the two clips along the top and bottom edge of battery compartment.

Lift the display assembly out of the midframe.

Use a spudger to disconnect the vibrator/power button assembly cable connector. Disconnect the antenna cable connector. Disconnect the display cable connector.

Disconnect the front-facing camera cable connector. Disconnect the headphone jack cable connector. Disconnect the digitizer cable connector.

Use the spudger to disconnect the antenna cable connector from the motherboard. Disconnect the soft button cable connector. Disconnect the USB board cable connector.

Remove the 3 mm Phillips #00 screw securing the motherboard to the display assembly.

Gently remove the motherboard. Hold the motherboard by its edges to prevent ESD damage. Be careful not to snag it on any cables as you extract it from the display assembly.

Remove the 3 mm Phillips #00 screw securing the headphone jack assembly to the display assembly.

Grasp the headphone jack portion of the assembly and lift it out of its groove in the display assembly.

Gently pull the headphone jack straight up without twisting the cable to remove the earpiece speaker portion from its recess. Twisting or pulling unevenly could damage the cable. Be very careful as you extract the assembly.

Remove the 3mm Phillips #00 screw from the front-facing camera bracket. Remove the front-facing camera bracket.

Remove the front-facing camera. Remove the 3 mm Phillips #00 screw securing the antenna board to the display assembly.

Insert the tip of a spudger under the antenna board to free it from the adhesive holding it to the display assembly.

Gently de-route the antenna cable from its channel in the display assembly.

Remove the antenna cable from the display assembly. When reassembling your device, install the USB board and attach the antenna connector before routing it into the channel. This will ensure the proper placement of the antenna cable connectors.

Insert the tip of a spudger under the vibrator to free it from the adhesive holding it to the display assembly. Do not attempt to remove the vibrator entirely as it is still attached to the vibrator/power button assembly.

Use tweezers to detach the power button from the adhesive securing it to the display assembly. Remove the vibrator/power button assembly from the display assembly.

Remove the 3 mm Phillips #00 from the speaker enclosure. Remove the speaker enclosure.

Use the flat end of a spudger to disconnect the antenna cable connector from the USB board.

Push the flat end of a spudger under the USB board to separate it from the display assembly. nsert the spudger at a shallow angle to avoid bending or damaging the USB board. Remove the USB board from the display assembly.

Gently drought the antenna cable from its notch in the display assembly. Remove the antenna cable.

How to replace the hard disk of Apple Mack Mini

HARD DISK REPLACEMENT PROCEDURE 

Place your thumbs in the depressions cut into the bottom cover. Rotate the bottom cover counter-clockwise until the white dot painted on the bottom cover is aligned with the ring inscribed on the outer case.
You do not need to apply much downward pressure while turning.

Tilt the mini enough to allow the bottom cover to fall away from the outer case. Remove the bottom cover and set it aside.

Remove the two 11.3 mm T6 Torx screws securing the fan to the logic board near the antenna plate.

Lift the ear of the fan nearest the RAM up off the standoff secured to the outer case. Removing the standoff screw is not necessary to remove the fan. You need only raise the fan enough to lift it off the standoff screw.

Lift the fan out of the mini for enough clearance to access its connector. Carefully pull the fan cables upward to lift the fan connector up out of its socket on the logic board. Remove the fan.

Remove the single 3.5 mm T6 Torx crew securing the cowling to the heat sink.

Lift the cowling from the end nearest the antenna plate. Rotate the cowling away from the outer case and remove it from the mini.

Remove the following screws securing the antenna plate to the mini:

Two 6.6 mm T8 Torx screws Two 5.0 mm T8 Torx or 2.0 mm Hex screws (either screwdriver will work)
W hen putting back together: It can be difficult to get the hard drive seated correctly such that the antenna plate fits in place correctly. If the screw holes don't line up with those on the hard drive, make sure that the two pins that are in the back of the hard drive are properly seated in the holes at the back of the case, above the housing for the second hard drive. The antenna attaches directly to the hard drive (red markers), therefore attaching the antenna can move the hard drive around and loosen the connection of the hard drive cable to the logic board.

Slightly lift the antenna plate from the end closest to the RAM. Carefully pull the antenna plate away from the circular rim of the outer case.

Do not remove the antenna plate yet. It is still attached to the AirPort/ Bluetooth board.

Use the tip of a spudger to carefully pry the antenna connector up from its socket on the AirPort/Bluetooth board.

Remove the antenna plate from the mini.

Use the flat end of a spudger to pry the hard drive connector up from its socket on the logic board.

Use the tip of a spudger to lift the IR sensor connector up and out of its socket on the logic board.

Remove the following three screws: One 5.0 mm T8 Torx or 2.0 mm Hex screw (either screwdriver will work)
One 16.2 mm T6 Torx screw
One 26 mm T6 Torx standoff

To remove the logic board, the two cylindrical rods of the Mac Mini Logic Board Removal Tool must be inserted into the holes highlighted in red. Inserting instruments into any logic board holes other than the ones highlighted in red may destroy the logic board.

Insert the Mac Mini Logic Board Removal Tool into the two holes highlighted in red. Be sure it makes contact with the top side of outer case below the logic board before proceeding.
Carefully pull the tool toward the I/O board. The logic board and I/O board assembly should slightly slide out of the outer case.
Cease prying when the I/O board is visibly separated from the outer case.
Remove the Mac Mini Logic Board Removal tool.

Simultaneously push the two plastic clips on the far left and right sides of the I/O board toward the middle of the I/O board and pull the I/O board away from the outer case. Only pull the logic board assembly out of the outer case until the edge of the I/O board is about .5" away from the edge of the aluminum outer case.

Pull the hard drive away from the front edge of the mini and remove it from the outer case.

Remove the strip of tape connecting the hard drive cable to the hard drive. Remove the hard drive cable by pulling its connector straight away from the hard drive.

Remove the two 6.2 mm T8 Torx screws from the side of the hard drive. Carefully peel the hard drive cover off the hard drive. Hard drive remains.

HP 210 G1 Notebook – Disassembling procedure

HP 210 G1 Notebook – Disassembling procedure – How to remove the display – How to remove the Service door – How to remove the RTC battery How to remove Battery

Before removing the battery, follow these steps:
1. Turn off the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system.
2. Disconnect the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
Remove the battery:

1. Turn the computer upside down on a flat surface.
2. Position the computer with the rear toward you.
3. Slide the battery lock latch (1) to the unlocked position.

4. Slide the battery release latch (2) to release the battery.
5. Remove the battery (3).

How to remove Service door

Before removing the service door, follow these steps:
1. Turn off the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system.
2. Disconnect the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the battery
Remove the service door:
1. Lift up on the rear edge of the service door (1) until the left and right sides detach from the computer.
2. Remove the service door (2).

How to remove Hard drive

Before removing the hard drive, follow these steps:

1. Turn off the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system.
2. Disconnect the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the battery
5. Remove the service door
Remove the hard drive:
1. Disconnect the hard drive connector cable (1) from the system board.
2. Release the hard drive connector cable from the routing channel (2) built into the base enclosure.
3. Remove the four Phillips PM2.0×2.75 screws (3) that secure the hard drive to the computer.

4. Remove the hard drive.

How to remove Memory module

Before removing a memory module, follow these steps:
1. Turn off the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system.
2. Disconnect the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the battery
5. Remove the service door
Remove the memory module:
1. Spread the retaining tabs (1) on each side of the memory module slot to release the memory module. (The memory module tilts up.)
2. Remove the memory module (2) by pulling the module away from the slot at an angle.

How to remove RTC battery

Before removing the RTC battery, follow these steps:
1. Turn off the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system.
2. Disconnect the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the battery
5. Remove the service door
Remove the RTC battery:
1. Disconnect the RTC battery cable (1) from the system board.
2. Release the RTC battery cable (2) from the routing channel built into the bottom cover.

3. Detach the RTC battery (3) from the bottom cover. (The RTC battery is attached to the bottom cover by double-sided tape.)

How to remove Display panel

Before removing the display panel, follow these steps:
1. Turn off the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system.
2. Disconnect the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the battery.

Remove the display panel:
1. Remove the plastic screw covers (1) and the two Phillips screws (2) that secure the display bezel to the display assembly.

2. Flex the inside edges of the left and right sides (1), and the top edge (2) of the display bezel until the top and sides of the bezel disengage from the display enclosure.

3. Partially close the display cover, and position the computer with the hinges up.

4. Using a thin, flat tool, disengage the hinge caps (1), and then use the tool to release the tabs (2) at the bottom of the display bezel.

5. Open the display cover, and position the computer facing you.

6. Remove the display bezel.

7. Remove the four Phillips screws (1) and carefully move the display panel (2) to the keyboard.

8. Release the adhesive tape (1) and disconnect the display panel cable connector (2).

Error codes, troubleshooting, schematic diagram, electrical parts and more – Samsung DV5008J clothes dryer

When an error occurs, this function starts to keep generating error buzzer sound and displays error indicators as shown in the followings per corresponding error by blinking in 0.5sec intervals until the error status is completely cleared out. In this case, all the driving devices are turned off until the error is cleared out.
1. THERMISTOR ERROR.
1. Display shows 'E5'
In case the Thermistor or Thermistor Circuit short.
The temperature of thermistor is more than 65℃ for more than 5 sec.
 2. Display shows 'E1'
In case the Thermistor or Thermistor Circuit Open.

2. MOTOR ERROR
Display shows 'E3'
In case the Motor or Motor Circuit Open.
3. HEATING ERROR
Display show 'EH'
This Error message occurs only ' HEATING TEST MODE '.
The temperature of thermistor rises less than 2℃ for 1 minute.

As the dryer micro controller is configured of a complicated structure, there might be a need for a service call. The information below is prepared for exact trouble diagnosis and suitable repair guide.

Do not replace the PCB assembly based on wrong diagnosis. The PCB itself is designed with high reliability. If you decide that the PCB should be replaced, then please follow the procedure of trouble diagnosis.

As the dryer micro controller is configured of a complicated structure, there might be a need for a service call. The information below is prepared for exact trouble diagnosis and suitable repair guide.

As some electronic components of PCB may be damaged by the charged static electricity from the resin part of dryer or a human body, please remove the potential difference of electricity of the human body and dryer by touching the power cord before you work with PCB.

1.Driving Compartment Test Mode.

1.Press ① and ④ buttons simultaneously
2.Display shows 'tA' after whole lamps turn on for 3 seconds
3.Press ③ button
4.Motor On (1sec) > Off (1sec) > Heater On (1sec) > Off (1sec) > Continue

2.Heating Test Mode.
1.Press ② and ④ buttons simultaneously
2.Display shows 't5'
3.Check the Motor pulse, Heating temperature.
4.EH: Heating Error, E3: Motor Error.

Schematic diagram

How to disassemble Samsung DV5008JGW3 clothes dryer, exploded view and parts list

Assembly and Disassembly

ASSY-COVER TOP
1) Remove 2 screws fixing the top-cover on back side.
2) Push the top-cover back about 15mm and pull it up.
3) It's possible to exchange and service Panel(PCB),  Thermostats and Door-Switch.

Back Cover.
1) Remove three screws fixing the Cover to Frame.
2) It's possible to exchange and service Condenser,  Thermistor and release the belt from the motor.

Assy-Door.
1) Remove 4 screws fixing two Hinge-doors.

Front Frame.
1) Remove the top-cover.(Step1.)
2) Remove the screw fixing the Panel-Drawer on inside.
3) Remove the Cover-Drawer by using the dryer.
4) Remove the screw fixing the Control-Panel on front side and the screw on right side.
5) Remove the Cover-Front(L) by using the (-) driver.
6) Remove 2 screws fixing the Frame-Front and Duct-Front.
7) Remove 8 screws fixing the Frame-Front.
8) Disconnect the wire-housing from the Door-Switch.

Assy-Drum

1) Remove the 3 screws fixing Duct-Front.
2) Remove the 2 Special-screws and 4 screws fixing the Upper-Plate.
3) Remove the screw fixing the Cover-Bushing.
4) Remove the E-Ring using (-) driver.
5) Remove the Washer.
6) Remove the Belt.
7) Pull out the Assy-Drum.

Assy-Motor.
1) Remove the Spring on the Bracket-Idler.
2) Disconnect the wire-housing from the Motor, Condenser and Thermistor.
3) Lay down the dryer on back side.
4) Remove 2 of 4 screws and loose other 2 screws.
5) Push the Assy-Motor front about 10mm and pull it up.

Heater
1) Disconnect the wire-housing from the Main Wire-Harness behind the Cover-back.
2) Remove 4 Holder-wires inside the Frame.
2) Remove 4 screws fixing the Cover-Heater.
3) Remove 2 nuts fixing the Cover-Heater and Heater.
4) Remove 2 washers.

Assy-Door
1) Remove 4 screws fixing the Door-Front side.
2) Remove 2 Cover-Hinges.
3) Remove 4 screws fixing the Hinge-Doors.
4) Remove the 2 screws fixing the 2 Lever-Doors.
5) Remove the 2 Cover-Screws.
(Reversing the Door: reassemble steps)
1) Exchange the place of Hinge-Doors and Cover hinges.
2) Exchange the place of Lever-Doors and Cover-Screws.
3) Rotate the Door-Front 180°
4) Reinstall 4 screws removed Step1.

Assy-Motor&Duct
1) Remove 5 screws fixing the Cover-duct fan. 

2) Remove nut fixing the Fan.  (When griping the Vice Plier, Avoid not to damage Pulley tooth)
3) Remove 3 screws fixing the Duct-fan.
4) Remove 2 screws fixing the Fixer-Motor and Pull out Assy-Motor.

Exploded view and part list

Apple AirPort Extreme – How to replace the faulty WIFI card of apple airport extreme

Apple AirPort Extreme

First start by peeling off the outer rubbery covering on the bottom of the device. CAUTION: This part is very fragile, so it is recommended that a blow dryer is used on the covering to heat it up. Simply blow dry the covering while slowly peeling it away, and the covering will not tear.

After removing the rubber covering, unscrew the five 4.9mm Phillips screws in the holes of the plastic casing.

After unscrewing all five screws, remove the plastic casing. The back should now look like the picture shown.

The inner metal casing is latched inside the outer white plastic shell, so insert a pry tool underneath the metal casing and pry it apart from the shell. It should make a click when it comes apart.

Remove the outer casing. The exposed logic board should look like this. Take the device out of the casing and orient it so that you can see the WiFi card.

Wires come from the three antennas and connect on the outer edge of the WiFi card. Carefully pull up on the end of one of the wires to disconnect it from the motherboard. Do this for the remaining two wires.

There are two clips attached to the upper and lower ends of the WiFi card CAUTION: For the following step, do not pull the clip after you have detached it. The clip is fragile and too much force may cause the clip to break. Grab the end of one of the clips and pull away from the WiFi card. This should make the clip visibly detached from the WiFi card. Do the same for the other clip.

Grasp the upper and lower ends of the WiFi card. Carefully pull the WiFi card to the right. CAUTION: Do not pull UP (towards yourself) on the WiFi card when removing. The card is on a track that only allows it to move left and right. Forcing the card to move in other directions may result in breaking the track. Completely remove the WiFi card.

How to replace the battery of Mac Pro – How to replace the Memory

Apple Mac Pro – How to replace the battery of Mac Pro – How to replace the Memory of apple Mac pro – How to remove the case

Apple Mac Pro  Opening the Computer
Shut down the computer.
Warning: Always shut down the computer before opening it to avoid damaging its internal components or the components you are installing. Do not open the computer or attempt to install items inside it while it is on.
Wait 5 to 10 minutes to allow the computer’s internal components to cool.
Warning: After you shut down the system, the internal components can be very hot. You must let the computer cool down before continuing.
Unplug all external cables from the computer except the power cord.
Touch the metal PCI access covers on the back of the computer to discharge any static electricity from your body.
Important: Always discharge static before you touch any parts or install any components inside the computer. To avoid generating static electricity, do not walk around the room until you have finished working and closed the comput

Unplug the power cord.

Hold the side access panel and lift the latch on the back of the computer.
Warning: The edges of the access panel and the enclosure can be sharp. Be very careful when handling them.
Remove the access panel and place it on a flat surface covered by a soft, clean cloth.

Removing the Installed Battery

Carefully lay the computer on its side so that the open side faces up. Locate the battery.

Remove any PCI Express card that blocks access to the battery. (See the replacement instructions for “PCI Express/Graphics Card.”) Slide the battery out from underneath the battery holder’s metal clip.

Remove the battery from its holder.

Installing the Replacement Battery

Insert the new battery into the holder, making sure the battery’s positive symbol (+) faces up.

Warning: Installing the battery incorrectly may cause an explosion. Be sure the battery’s positive and negative sides are correctly oriented in the holder. Use only the same type of battery or an equivalent recommended by the manufacturer of the original.

Important: Batteries contain chemicals, some of which may be harmful to the environment. Please dispose of used batteries according to your local environmental laws and guidelines.

Closing the Computer
Replace the access panel.
Note: Make sure the latch is in the up position before replacing the access panel. If the latch is down, the access panel will not seat correctly in the enclosure.
Push the latch down to close and secure the access panel.
Warning: Never turn on the computer unless all of its internal and external parts are in place and it is closed. Operating the computer when it is open or missing parts can damage it or cause injury.

Memory (FB-DIMM) Replacement procedure

Note: The Mac Pro computer has two memory riser cards with a total of 8 memory slots. On each card, the slots are arranged as two banks of two slots each. The computer comes with a minimum of 1 GB of memory, installed as a pair of 512 MB fully buffered, dual inline memory modules (FBDIMMs) in two of the DIMM slots. Additional DIMMs can be installed in the open DIMM slots, as illustrated below.
DIMMs must be installed in pairs of equal size from the same vendor. In the illustration below, DIMMs in one colored pair do not need to match DIMMs in a different colored pair.

DIMMs for Mac Pro must fit these specifications:

667 MHz, FB-DIMMs
72-bit wide, 240-pin modules
36 devices maximum per DIMM
Error-correcting code (ECC)
Memory from older Macintosh computers is not compatible with Mac Pro.
Important: For proper operation of Mac Pro computers, Apple recommends using only Appleapproved Mac Pro FB-DIMMs. Refer to GSX for Apple FB-DIMMs service part numbers.

Opening the Computer
Shut down the computer.
Warning: Always shut down the computer before opening it to avoid damaging its internal components or the components you are installing. Do not open the computer or attempt to install items inside it while it is on.
Wait 5 to 10 minutes to allow the computer’s internal components to cool.
Warning: After you shut down the system, the internal components can be very hot. You must let the computer cool down before continuing.
Unplug all external cables from the computer except the power cord.
Touch the metal PCI access covers on the back of the computer to discharge any static electricity from your body.
Important: Always discharge static before you touch any parts or install any components inside the computer. To avoid generating static electricity, do not walk around the room until you have finished working and closed the computer.

Remove the  case as per the above instructions  

Removing the Installed FB-DIMM
Carefully lay the computer on its side so that the open side faces up.
Locate the FB-DIMMs.

Holding the memory riser card by the two finger holes, pull it out of the memory cage and place the card DIMM-side-up on a soft, clean cloth.

Open the ejectors on the DIMM slot by pushing them out to the sides, and remove the FB-DIMM from the riser card.

Warning: FB-DIMMs carry heatsinks on either side of the DIMM. Never attempt to remove the heatsinks from the DIMMs. Doing so could damage the DIMM.

Installing the Replacement FB-DIMM
Align the DIMM in the slot on the memory riser card and push both ends of the DIMM down until the ejectors snap back up into place.

Insert the replacement riser card into position in the memory cage, pushing slightly until the card is seated in its logic board memory slot.

Closing the Computer
Replace the access panel.
Note: Make sure the latch is in the up position before replacing the access panel. If the latch is down, the access panel will not seat correctly in the enclosure.
Push the latch down to close and secure the access panel.
Warning: Never turn on the computer unless all of its internal and external parts are in place and it is closed. Operating the computer when it is open or missing parts can damage it or cause injury. 

Samsung HTz 210 – SMPS and amplifier schematic, no power, protection troubleshooting

How to troubleshoot power failure, power protection, power [SMPS] and main amplifier schematic - Samsung HTz210
Measures to be taken when the Protection Circuit operates

Operation of Power Block Protection Circuit

The Condition of Power Protection Active.
1. Voltage of SMPS’s PVDD (+34.5V, J3) is higher or lower than Standards.
Normal Condition Voltage Range: PVDD (+34.5V, J3): about +34.5V
2. Over-current occurs to AMP IC. (Over-output or Output short)
3. AMP IC’s temperature exceeds 150°C.
4. No supply voltage on GATE DRIVER

SMPS board & circuit diagram

Power Protection

* OTW: Active, IC’s inner temperature exceeds over 150°C.  (Under 2.7V, Protection Circuit wills Active)

* TAS5352 3rd PIN: Shout down  (Under 2.7V, Protection Circuit wills Active)

Total power failure troubleshooting

Check Amp in Power Protection

[check AMP Malfunction before disassembling Main Unit (Do NOT Insert AC-Cord in AC-Socket)]

Connector voltages

Amplifier schematic

HP TouchSmart tm2 - Notebook PC – Disassembling procedure

HP TouchSmart tm2 - Notebook PC – Disassembling procedure – How to remove the case – How to remove the battery – How to remove the HDD
 How to remove Computer feet

The computer feet are adhesive-backed rubber pads. There are four computer feet that adhere to the computer base enclosure. The feet (1) on the front edge of the computer are round. The feet (2) on the rear edge of the computer are oblong and wedge-shaped. The computer feet are available in the Rubber Kit, spare part number 592966-001.

How to remove Battery

Before disassembling the computer, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power cord.
Remove the battery:
1. Turn the computer upside down, with the front toward you.
2. Slide the battery lock latch (1), and then release it. (The battery disengages from the computer.)
3. Remove the battery (2) by lifting the front edge, and then swinging it up and back.

How to remove Hard drive

Before removing the hard drive, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power cord.
4. Remove the battery
Remove the hard drive:
1. Position the computer with the front toward you.
2. Loosen the two Phillips PM2.0×5.0 captive screws that secure the hard drive cover to the computer.

3. Lift the rear edge of the hard drive cover, and then swing it up and forward.

How to remove WWAN module

Before removing the WWAN module, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power cord.
4. Remove the battery
5. Remove the hard drive cover
Remove the WWAN module:
1. Disconnect the WWAN antenna cables from the WWAN module.

2. Remove the two Phillips PM2.0×4.0 screws that secure the WWAN module to the system board. (The edge of the module opposite the slot rises away from the computer.)

3. Pull the WWAN module away from the slot at an angle and remove it.

How to remove RTC battery

Before removing the RTC battery, follow these steps:

1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power cord.
4. Remove the battery
5. Remove the memory cover
Remove the RTC battery:
1. Disconnect the RTC battery cable (1) from the system board.
2. Release the RTC battery (2) from the system board. (The RTC battery is attached to the system board by double-sided tape.)

How to remove Top cover

Before removing the top cover, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power cord.
4. Remove the battery
5. Remove the hard drive
6. Remove the memory cover
Remove the top cover:
1. Remove the two front rubber feet (1).
2. Remove the 17 Phillips PM2.5×6.0 screws (2) that secure the top cover to the computer.

3. Remove the two Phillips PM2.0×4.0 screws in the battery bay that secure the top cover to the computer.

4. Turn the computer right-side up, with the front toward you.

5. Lift the front edge of the top cover (1) until it rests at an angle.
6. Release the zero insertion force (ZIF) connector to which the TouchPad cable is connected and disconnect the TouchPad cable (2) from the system board.
7. Release the ZIF connector to which the keyboard cable is connected and disconnect the keyboard cable (3) from the system board.