iBook G4 12" 1.33 GHz Logic Board Replacement

Schritt 1

Lay your iBook upside down on a flat surface.
Use a coin to rotate the battery locking screw 90 degrees clockwise.
Lift the battery out of the computer.

Schritt 2

Pull the keyboard release tabs toward you and lift up on the keyboard until it pops free.
If the keyboard does not come free, use a small flathead screwdriver to turn the keyboard locking screw 180 degrees in either direction and try again.
Flip the keyboard over, away from the screen, and rest it face-down on the trackpad area.

Schritt 3

Remove the four silver Phillips screws that secure the RAM shield.

Schritt 4

Pull the keyboard cable up from the logic board, holding the cable as close to the connector as possible.
Make sure that you reconnect the keyboard cable before replacing the RAM shield.

Hi please help me

mominshahbaz922 -

Schritt 5

Use a spudger or small flathead screwdriver to remove the three rubber feet from the lower case.

"Close the display and flip the computer over." ...Seems like this instruction ought to be at the beginning of step 1 rather than step 2. In step one, the display is already closed and the computer flipped over. In step 2, you just keep it in this position and proceed from taking the battery out to removing the rubber feet.

margaretmiz -

Don't use a screwdriver! I broke out one of them...

Creditcard, FIngernails would be fine.

hugobass -

Well, if you've had an iBook G4 this long, odds are the little rubber feet are falling off just from being looked at. Except the battery mounted one. That sucker is the Devils' Tower of little rubber feet.

john pellino -

Schritt 6

Remove the three newly-revealed Phillips screws.

Schritt 7

Use a spudger or small flathead screwdriver to pry up the three metal rings that housed the rubber bumpers.

I bought & used the tool kit that you sell for this repair. The 3 rings came off when the screws came out--maybe because the screw bit holder is magnetized.

syl57 -

Schritt 8

Remove the three Torx screws using a T8 Torx screwdriver.
The shorter screw is in the center of the computer.

I found T9's rather than T8's.

gdavids57 -

I found 2mm allen screws in this location

rneumann -

it seems a little bit weird to be using a Torx Screwdriver (T8 or T9 as the case may be) to remove hex screws. My machine has Torx screws in these locations.

Kostas Kritsilas -

Schritt 9

Remove the two 4.5 mm Phillips screws on either sides of the battery contacts.

Schritt 10

Breathe deeply. Trying times are ahead, but we promise the lower case does come off.
Push the thin rims of the lower case surrounding the battery compartment in, bending them past the tabs, and then lift up to free that corner of the lower case.

When I did this, it helped to start around the disc drive

kleitscs -

I find that a stiff nylon guitar pick will work if you don't have a spudger.

discodamon -

I didn't find this step difficult at all. I have very short nails. I imagine a woman with long nails might have a problem grasping the rim and pulling up.

syl57 -

Definitely read the rest of the instructions now. I struggled at first... I was using my ipad with the step by step instructions and didnt scroll down past this photo, so I didnt see the sequence of how to loosen the tabs. in fact I didn't know where the tabs might be... Only discovered that part when I reassembled it. The spudger didn't work for me. Too soft, I used mostly a thin very small screwdriver.

manyanelson -

Schritt 11

There is a slot on the wall of the battery compartment that locks the lower case in place. Use a small flathead screwdriver to pry out the slot's lower rim and pull up on the lower case to free the slot from the tabs holding it.

Schritt 12

Run a spudger along the seam between the lower case and upper case on the front of the computer to free the tabs locking the lower case. Pull up on the lower case and continue to use the spudger as necessary until you hear three distinct clicks.

Steps 7-9 were effortless for me.

syl57 -

Schritt 13

Continue to run the spudger around the front right corner. There are two tabs on the port side of the computer, one near the front corner and one near the sound-out port.

Schritt 14

There are three tabs over the optical drive that must be released before the lower case can come off. Slide the spudger into the lower case above the optical drive and run it toward the back of the computer until you hear three distinct clicks.

try using the spudger at the back near the vents. To be specific, on the left side of the hinge when faced upside-down. It's easier this way and it's described on Apple's official repair manual.

Jinhan Liu - 21/05/17

then put a library card or something between the outer enclosure and the optical drive enclosure then pull from the other side to free the casing

Jinhan Liu - 21/05/17

Schritt 15

The front and sides of the lower case are now free.
Turn the computer so that the back is facing you and pull the lower case up and toward you until the back tabs pop free.
It may be helpful to jiggle the case up and down.

Steps 10-12 were just as easy. I bought & used the Spudger, too.

syl57 -

this required a little more force than I felt comfortable with at first.

Dave -

Removing the back cover at this final step was had for me; I had to use a flathead screwdriver to separate the back edge of the cover away…I was not able to separate the lower case all the way by pulling the lower case up and toward me as shown in the photo.

Jean S Barto - 09/06/19

Schritt 16

Remove the small greasy springs with white plastic caps from either side of the battery contacts.

Schritt 17

Have patience and follow the directions, the end result is up to you. In my case it worked. But I was a Technician TRW Automotive. and worked on Air Bag modules that was returned from customer's that needed them analyzed. I just retired after 26 years.

Schritt 18

Remove the following 4 screws from the bottom shield:
Two 3 mm Phillips.
Two 7.5 mm Phillips.

This is where things got interesting for me. I had 4 missing screws! I don't know if it came from Apple like that (highly doubtful) or if it was returned to me without the screws from the Apple Store repair I had done to replace the Latch (more likely, huh?).

syl57 -

Schritt 19

Lift the bottom shield off.

Schritt 20

Remove the two Phillips screws securing the DC-In board, removing tape as necessary.

Be careful here as the actual DC silver connector is raised from the chipboard so once you remove the screws use the spudger to gently lift out the DC IN board itself. There's some rubber casing around the silver connector too which got caught on the plastic casing of the laptop which required a bit of gentle poking to get free...

loughlin -

Again, I was missing a screw here--the left one! The process of removing this part was not a problem.

syl57 -

Is it necessary to remove DC cable?

rickyzhang - 21/08/16

@rickyzhang Yes, in order to remove the top case, this is required.

CL Johnson - 08/10/16

8 Bit Guy clearly bypassed that step somehow. https://www.youtube.com/watch?v=52-nCu2w...

Adam Panák -

Schritt 21

Deroute the cable from around the optical drive, removing tape as necessary.
Disconnect the DC-In cable from the logic board and angle the DC-In board out of its compartment.

Also, once I removed it, I thought there was more to do. It happened so quickly and effortlessly! I kept wondering when the difficult and trying part was coming. I was kind of disappointed by the lack of the challenge, but that's OK! The difficult part came from reversing the directions and getting the shield back in place. A cable covering on the back edge under the shield slipped out and prevented the metal tabs from seating correctly. Once I figured that out, it was smooth sailing!

syl57 -

Why? It‘s not necessary

Benjamin Grunmaurer - 13/12/17

Schritt 22

Remove the two 3 mm Phillips screws inside the left edge of the battery tray.
Three 3 mm Phillips around the battery compartment.
Three 4.5 mm Phillips along the optical drive bezel. (a magnetic screwdriver may help to lift these screws out)
One 12 mm Phillips in the lower right corner.
Four 14.5 mm Phillips.

The first two screws in this step are legit. The next eleven do not exist.

mknoy - 13/02/17

Schritt 23

We recommend placing the computer on a soft cloth from this point on to prevent damaging the logic board.
Turn over the computer and open it.
Use the flat side of a flathead screwdriver to remove the small magnet covering a screw near the middle of the computer.
The shorter screw goes in the lower left corner.

Schritt 24

Remove the following 7 screws from the edges of the keyboard area.
Three 2 mm Phillips along the right edge.
One 4.5 mm Phillips underneath where the magnet was.
One 6 mm Phillips with a small head in the lower left corner.
Two 6 mm Phillips with large heads, one in the upper left corner and one in the middle.

The green screw in the middle may be a bit bigger on some models.

Finder352 - 14/12/20

Schritt 25

Before you can yank the upper case off, you must disconnect the trackpad connector, the blue and white power cable, and speaker cable as described in the next steps. Be especially careful with these cables; never pull directly on the cables, but use a spudger to pry up the connector directly.
Carefully lift the upper case slightly and move it toward the front of the computer to reveal the trackpad connector. Use a spudger or your finger to disconnect the trackpad connector hidden beneath the white plastic tab.
After disconnecting the track pad connector, carefully rotate the upper case away from you and rest it against the display.

Although these instructions forewarn that these connectors are fragile, I would suggest emphasizing this in BOLD. When one of these connectors in the next couple steps pulls free from the logic board, as my speaker connector did with very little force, I was told by my Mac repair center that "...you're at the end of the road, period. There's no way we can re-solder that speaker connection". This may not be totally correct because other advice in iFixit suggests it is possible but regardless, the extremely small contact pads that need to be re-soldered really requires removing the entire logic board, experience with very tiny solder projects, and double the time and effort.

A second tool such as a tiny flat blade screw driver to hold down the connector that is soldered to the logic board while pulling/prying up on the male side of the connector with the spudger so that the soldered portion doesn't rip off the board was found to be helpful.

This set of instructions however is very complete, just read them carefully.

crtolson -

If the speaker connection (step 25) is carefully/successfully removed, it is possible to leave the power button (blue and white, step 26) connector in place and carefully lift the metal cover to access the HD toward the front.

crtolson -

Follow crtolson's advice, but when prying the connectors, do it one side at a time, and use a LIGHT touch when doing so. Work each side slowly, HOLDING DOWN THE HEADER IN THE CENTER WITH A SMALL FLAT-HEAD PRECISION SCREWDRIVER, pulling up lightly with the spudger once per side. The connector will eventually come loose enough to lift it from the header. DO NOT USE YOUR FINGERS! Always use a spudger.

The instructions in CAPS are VERY important, lest you pull the header off the board. I've made this mistake myself, and I've been working on Mac notebooks for 20 years...

CL Johnson - 08/10/16

Prying with spudger... Connector "walked out" with socket on logic board.(contacts were intact, solder is pretty bad after those years)It is like a lottery. I had to use great force to separate these two afterwards.

Adam Panák -

Schritt 26

The connectors at the ends of the following cables are attached very firmly to the sockets on the logic board. Pulling directly on the cable will either separate the cable from its connector or the socket from the logic board.
Use the sharp end of a spudger to disconnect the speaker cable connector.

The speaker cable connector was very tightly connected into the socket. When I tried to take it out the socket came right off the motherboard. In this case, in order to pull out the connector plug you must hold down the socket at the same time to make sure it isn't pulled from the motherboard.

tbj240 -

i got a used book and opened it to exchange the hd to a bigger one. i found the airport/bluetooth cards connective socket dislocated and the speaker cables' socket as well. now i've led the free end of the speaker cable together with its connector through the opening of the kensington lock outside the case (no easy task but it went through) to fix a jack which goes into the headphones plug.

channy8 -

The male connector came out with the female one right off my logic board. I tied very carefully gluing it back. Appears that isnt enough; will need to be soldered back into place if I aver want to have sound again. USB, Bluetooth or AirPlay/AirTunes seem to be my remaining options.

Be very careful with this step!

Chimpur - 05/01/15

Schritt 27

Using the sharp end of a spudger, disconnect the connector for the blue and white power cables. Again, be careful to pry up only on the connector.
It is very easy to break the connector from the board, so be careful.
The key is to apply force in two directions, down to keep the surface board connections intact, up to release the connector.
The upper case is now free and can be removed from the computer.

Be careful with this step, when I did I was stuck with glue on the cable connector of the card.

JCarlos19 -

Warning, be extremly carful with this step! I lift the hole socket from the board. :(

Its not cool to have a new "big" HD in a computer without powerbutton!

And belive me it is really a tiny work to solder it in place again.

hugobass -

There is a rectangular magnet on the underneath side of the upper case assembly near the CD-ROM. Be sure it is in place or the "close lid and sleep" function will not work.

apenzott -

There is actually no need to remove the power plug if you are careful with the placement of the top cover. I had the whole plug pull of the board and had to solder it back again. Not an easy task had to use a magnifying glass to see it.

john50 -

Zitat von john50:

There is actually no need to remove the power plug if you are careful with the placement of the top cover. I had the whole plug pull of the board and had to solder it back again. Not an easy task had to use a magnifying glass to see it.

I wish I had read John's comment! I thought I was being careful to unplug without pulling and I pulled the whole plug out of the board too : ( I've never soldered anything before.......

Ann -

Zitat von john50:

There is actually no need to remove the power plug if you are careful with the placement of the top cover. I had the whole plug pull of the board and had to solder it back again. Not an easy task had to use a magnifying glass to see it.

As noted above, be very careful!

I also had the whole plug come off the board and had to solder it back. Definitely try and do it without removing the blue & white power cable.

Matt -

Ditto. I didn't even notice that I'd torn the connector off the logic board until I went to put it all back together. It really is way too tight a connection and since you have so little room to work, it's VERY hard to pull it out without damage.

If you break this connection, anything else you're doing won't matter. Go slow, get a magnifying glass and perhaps try to hold town the part that's connected to the logic board as you attempt to pull out the connector....

If you have any problems or think that you can't do this, I'd say that you should stop, button it all back up and bring it to someone. Even a cheap, used logic board is around $250-350 -- and that's not worth it.

dylewski -

Zitat von Matt:

As noted above, be very careful!

I also had the whole plug come off the board and had to solder it back. Definitely try and do it without removing the blue & white power cable.

Several people have mentioned soldering the plug back.......How exactly did you achieve this?! Are you experienced with micro-soldering? Were you able to salvage your laptop?! Although I got good advice to take it to a tv/electronics shop and have them solder the blue and white cables directly to the board, I have not done this. The comp is still neatly packaged by teardown step and sitting in a cardboard box. It's really annoying to look at this useless box of components that used to be a very nice little laptop : (

I would love to hear how you managed the repair.

Ann

Ann -

Zitat von Ann:

Several people have mentioned soldering the plug back.......How exactly did you achieve this?! Are you experienced with micro-soldering? Were you able to salvage your laptop?! Although I got good advice to take it to a tv/electronics shop and have them solder the blue and white cables directly to the board, I have not done this. The comp is still neatly packaged by teardown step and sitting in a cardboard box. It's really annoying to look at this useless box of components that used to be a very nice little laptop : (

I would love to hear how you managed the repair.

Ann

The plug has two holes in the back that slot into two pins on the board.

I slotted the pins in and the two wires on the front of the plug that need soldering to the board line up where they attach to the board.

I used a soldering iron with a flat tip (like a flat-head screwdriver) and pressed on the two wires at the same time for a second or two. That was long enough to melt the solder and reattach the wires. It took two attempts to get it attached correctly.

I didn't add any extra solder and I haven't had much experience with soldering.

Matt -

Zitat von Matt:

The plug has two holes in the back that slot into two pins on the board.

I slotted the pins in and the two wires on the front of the plug that need soldering to the board line up where they attach to the board.

I used a soldering iron with a flat tip (like a flat-head screwdriver) and pressed on the two wires at the same time for a second or two. That was long enough to melt the solder and reattach the wires. It took two attempts to get it attached correctly.

I didn't add any extra solder and I haven't had much experience with soldering.

Ann -

Zitat von Ann:

Thanks Matt! That was a very complete description. My son (mechanical engineering student.....unfortunately, not electrical...lol) has some equipment. I'm hoping that he can manage it when he comes home this weekend. I do see the pins on the board and the two wires.

Thanks again sharing your approach!

Ann

Ann -

Zitat von JCarlos19:

Be careful with this step, when I did I was stuck with glue on the cable connector of the card.

DO NOT PRY!!!! just toasted my iBook following this lousy advise. Try pulling from the wires very lightly instead or cut back the surrounding metal to get a better approach. If anyone has a high res scan of the area surrounding the the plug and where to solder connection, I melted the socket and am now resorting to soldering directly to the board but its not going well.

eric -

It is NOT necessary to remove these cables. Just flip the upper case on the screen and secure it with a little tape and nothing can happen to this delicate connection!

Everling -

this is a very tricky step

Joel Grimes -

Man, this step is really hard. The hardest step of the iBook guide. It is possible to carefully wiggle it out. Bit by bit, wiggle the plug gently back and forth ever so slightly, so that it comes out. It is SO easy to break it. I've done it before. With patience, it can be done. Just take your time.

Jonas Kvale -

If you're careful and are able to remove the trackpad connector without damage, it is possible to lean the top case and metal shield against the screen, without having to remove the speaker and power connectors, while you replace the hard drive. You'll have to unstick the speaker cable from the shield first, remove the screws, and reroute the speaker cable out of the notch that it's in. SLOWLY remove the metal shield and CAREFULLY lean it up against the screen.

CL Johnson - 08/10/16

Say: wouldn’t it be a Good Idea to simply snip these wires a few inches from the connector, and twist the darn things back together? Don’t touch the delicate little plug! If you’re fussy & neat, the wires can be soldered & shrink tubing slipped over them. Note: I have a G4, but I have NOT done this work ( yet! ) Still…isn’t my idea pretty good?

Michael Maddan - 16/06/19

It is pity iI have not done that. Connector survived, but it wiggles and definitely not making good contact.(laptop refuses to power on)

Adam Panák -

Schritt 28

Remove the fifteen 3 mm Phillips screws securing the top shield to the computer.
Remove the following 16 screws:
Thirteen 3 mm Phillips.
One 3 mm Phillips. (actual screw not present in image)
Two 4 mm Phillips.
Be sure to fit the screw near the left hinge through the loop in the display data cable, securing the cable to the upper case.

Variant:

Upper-left corner is M2.5 x 5.5mm screw.

apenzott -

Schritt 29

Lift the top shield up from the right side, minding the upper left corner, which may catch on the metal framework.
When reassembling, make sure you pull the antenna cable all the way through the slot in the middle. It is extremely hard to pull it back through after the top shield is screwed back in.

Schritt 30

Use a spudger to pry up the Reed Switch Board from the optical drive, removing tape as necessary.

Schritt 31

Use your fingers to disconnect the Reed Switch Board connector from the logic board.

Schritt 32

Disconnect the RJ-11 cable from the top of the modem.

Schritt 33

Remove the two Phillips screws at the corners of the modem.

Schritt 34

Lift the modem and modem shield from the bottom.
When replacing the modem, seat the shield first, and then connect the modem and press it firmly into the shield, making sure that it is connected to the logic board.

Schritt 35

Remove the following three screws:
Two 3mm Phillips screws.
One 7.5 mm Phillips screw.
Lift the small plastic retaining bracket up and out of the computer.

Schritt 36

Using a spudger, pry up the AirPort/Bluetooth board from the end closest to the hard drive. Be sure to pry against the metal framework, as shown in the picture.

Schritt 37

Hold the AirPort/Bluetooth board in one hand and use a spudger to disconnect the two antenna cables.

Schritt 38

Lift the AirPort antenna cables off the heat sink and set them aside.
Lift the metal restraining bracket from the hard drive and place it aside.

Schritt 39

Remove the two Phillips screws from the white plastic fingers of the hinge grill.

Schritt 40

Remove the following 7 screws and 2 nuts from the heat sink:
One 3.5 mm Phillips from the lower left corner of the heat sink.
Five 6 mm Phillips from around the fan and at the center of the heat sink.
One 7.5 mm Phillips at the top right corner of the heat sink.
Two 4 mm screw nuts with attached springs from either side of the heat sink.

My heat sync looks different and had fewer screws than this.

RichBern -

There is a metal bracket going between the main heat sink body and portion around the fan. Do not forget to put this back on re-assembly!

gdavids57 -

Zitat von RichBern:

My heat sync looks different and had fewer screws than this.

You may want to confirm your iBook is an A1133 model.

gdavids57 -

Schritt 41

It may be necessary to soften the thermal paste between the logic board and heat sink. You can soften the thermal compound using a hairdryer. Move the hairdryer back and forth over the ribbed metal section of the heat sink for one minute. At this point, the heat sink should come free easily.
Use a spudger to pry the heat sink up on the left side, near the hard drive.

Schritt 42

Grasp the heat sink in one hand and lift up the hinge grill in the other hand so that you can remove the heat sink from the computer.
If you need to mount the heat sink back into the laptop, we have a thermal paste guide that makes replacing the thermal compound easy.

Schritt 43

Remove the two Phillips screws securing the white plastic fingers of the I/O bezel to the metal framework.
The longer screw goes into the longer finger, closer to the display.

Schritt 44

Lift up the left side of the computer and slide the I/O bezel away.

Schritt 45

Remove the single Phillips screw securing the EMI finger to the metal framework.
The screw goes into the hole between the modem and ethernet ports.
Lift the silver EMI finger off of the metal framework.

Schritt 46

Wedge a spudger between the RJ-11 board and the metal framework and slide the RJ-11 board down and off of the logic board.

Schritt 47

Remove the four Phillips screws securing the hard drive to the metal framework.

Schritt 48

Slightly lift the hard drive from the free end and pull the hard drive straight away from the connector.

Schritt 49

The cable you're about to remove is very fragile - do not pull directly on the wires. Instead, try to pry up the connector directly, using a spudger or a small flathead screwdriver if necessary.
Disconnect the microphone cable at the front of the computer, between the left side of the hard drive and the metal framework.

Schritt 50

Use the black plastic handle to disconnect the display data cable from the logic board.

Schritt 51

This is a diagram of the ribbon clamp connector you will disconnect in the next step.
1) With your fingernails, grasp the locking bar on either side and pull up a small amount (about 1/16" or 2 mm).
2) After disengaging the locking bar, slide the cable out of the connector.

Schritt 52

Release the optical drive ribbon clamp as described above. Slide the optical drive ribbon out of its connector.

Schritt 53

Close the display and flip the computer over.
Remove the following 12 screws:
Nine 3 mm Phillips.
One 3 mm Phillips with a thicker shaft at the bottom right corner of the logic board, next to the fan.
Two 7.5 mm Phillips on either side of the battery connector.

On my system there are seven 3mm screws, and two longer screws that go into the rib near the hard drive connector: Follow the top edge of the photo from right to left; the first red screw mark is one of them. Go directly down, the red crew mark you reach is the second one.

Yishai Sered -

Schritt 54

Disconnect the inverter, fan, and sleep light cables from the logic board.
When replacing the logic board, make sure that the inverter cable is not pinned under the logic board.

Schritt 55

Lift the logic board carefully from the computer.
Mind the thin metal EMI fingers surrounding the ports when replacing the logic board.

iBook G4 12" 1.33 GHz Logic Board Replacement

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