Introdução

Use this guide to replace a broken LED driver board.

Peças

Não são necessárias peças.

  • Before beginning, unplug your iMac and lay it on a soft surface as shown.

  • Stick a suction cup near each of the two top corners of the glass panel.

  • To attach the suction cups we sell, first position the suction cup with the movable handle parallel to the face of the glass panel. While lightly holding the suction cup against the glass, raise the movable handle until it is parallel with the other handle.

  • If your suction cups refuse to stick, try cleaning both the glass panel and the suction cup with a mild solvent.

Change "Before beginning, unplug your iMac and lay it on a soft surface as shown." to "Lay your iMac on a soft surface as shown"

Henry Barnett - Responder

my imac power sullye not powering

tahir - Responder

imac 2544 2.5 core i5 i touched the motherboard to supply and it spark now it is not powering

please tell me the directions

thanks witting for answering .

tahir - Responder

Im sorry to say, If it sparked when you touched it your motherboard s now fried. You need a new one.

Robert Wacker -

Very easy to lift the glass out. Don't jerk too hard.

kctipton - Responder

Success replacing the stock ST31000528AS with a STBD3000100 (Dead 1TB to new 3TB, both Seagate). First try. Using another Mac and a quality Firewire 800 cable, I formatted it using Target Disk mode, 2 partitions (defaults, except I made the first one bigger than the second). To the second, smaller one, I copied a bootable Install OS X Mavericks partition. Tried to boot. It booted, and I installed; nary a glitch. (Running the Installer over Firewire would have been faster, but I didn't want to reboot this machine.)

See part 2 below...

Matthew Elvey - Responder

(Part 2:)

I SKIPPED steps 6, 7 AND 8! Instead, after doing Step 5, I noticed I then had enough room and cable length to access the screws in Step 11 if I lifted the LCD up an inch or so, rotated it about 20-30 degrees clockwise and moved it a couple inches toward the base, and put it down. After removing them (Step 11), I propped up the LCD (with a spare spudger) and had enough room to do Steps 12, 13, and 14 without much difficulty. Felt safer/less work and risk than not skipping steps 6-8. No risk of the damage Ersan and Michael caused performing Step 7!

Matthew Elvey -

I just edited that step to add a note about the shortcut.

Matthew Elvey -

What the ???

Geoff Wacker has REJECTED my edit: https://www.ifixit.com/Guide/history/ste...

I wonder why. What's the deal, Geoff? I mean I'd understand if I suggested folks didn't need the suction cups, as that could cut into iFixit's income stream, but what's wrong with suggesting that a few steps aren't needed? It worked for me; the EMC 2389 I fixed is humming along with a new 3TB HD I installed while skipping those steps.

Matthew Elvey -

I did not have to remove a single cable! After undoing the torx screws from the sides, I was able to rotate the LCD out of the way enough to reach all the screws holding in the ODD bracket. One of them was a bit challenging to get to, but I never felt that I was risking the cables by leaving them connected. Also, it wasn't totally clear, but you have to actually remove the ODD itself from the ODD bracket - 4 torx screws. The SDD mounts into the hard drive enclosure, then the enclosure is screwed into the bracket. Those holes (enclosure <-> Bracket) did not line up correctly for me, and I had to go with only three of them connected in the end. Seems to work fine.

cdansmith1 - Responder

Another comment on DATA & LCD Temp. Sensor cables: I had to remove the vertical sync, and the backlight cable, however, if you have an assistant or/can carefully rotate the screen clockwise/and then have it held up about 5" to 6" at a slight angle, you do not need to remove LCD data cable or LCD thermal cable, however - IMPORTANT: you must have a second pair of hands/or way to securely prop up the LCD. Also, don't rotate too much, since then you will pull out LCD data cable, and it renders the whole exercise moot, or can damage the cable or connector.

MaximBorzov - Responder

You don't need suction cups. The screen, held by magnets, can simply be pried off using a very thin blade such as a screw driver and fingers.

Deepsurvival - Responder

That's a bad idea. using a metal tool to pry off glass is likely to end with an expensive broken front glass.

Suction cups are common. Find a couple and do it the safe way. I use some cheap ones that came with iPhone repair kit.

max damage -

Hello, I just need to replace a slightly cracked screen on my iMac. Where is it best to place the suction cups? Thanks in advance

michelemiller0 - Responder

No need for suction cups, I just stuck my nails (short like guys usually have) between the top part of the screen and body, and it came off easily. I've never done it before, so it seems to be very easy.

Nikolas Lintulaakso - Responder

Nails worked for me too

Rob Dale - Responder

Just completed the replacement of the optical drive with an SSD using an OWC Data Doubler kit. Attempted to remove the optical drive without disconnecting any cables but found it a bit fiddly to orient the screen for good access. I bit the bullet and disconnected them and found the process less daunting than I imagined. Reconnecting them was similarly straightforward if you're careful.

Tip: you can skip the step for removing the optical drive thermal sensor connector from the motherboard. Still need to remove the sensor from the optical drive but you can leave that hanging and reattach it to the SSD later.

osienna - Responder

I have an odd question -- I want to remove the polarizer from the LCD. With some monitors this is trivial, others not so much. My question is whether it is bonded to the Liquid crystal, or whether it's loose, or cutting it with a razor blade would remove it. Obviously I'd like to know before I go to the trouble of dismantling the thing... Thanks. Paul

Paul Kwiat - Responder

I use Garmin GPS suction cup. Work very well

jc3Dcx - Responder

Gently lift the glass panel perpendicular to the face of the LCD enough to clear the steel mounting pins attached along the underside of the top edge of the glass panel. Pull the glass panel away from the lower edge of the iMac and carefully set it aside.
  • Gently lift the glass panel perpendicular to the face of the LCD enough to clear the steel mounting pins attached along the underside of the top edge of the glass panel.

  • Pull the glass panel away from the lower edge of the iMac and carefully set it aside.

  • During reinstallation, be sure to meticulously clean the inside of the glass panel and the face of the LCD as any dust or fingerprints trapped inside will be annoyingly visible when the machine is turned on.

What's the best product to clean the face of the LCD?

Steve Speirs - Responder

Microfiber Cloth

Leonardo Fournier -

Remove the eight 8 mm T10 Torx screws securing the display to the outer case. The last two pictures are detail shots of each side of the display. The last two pictures are detail shots of each side of the display.
  • Remove the eight 8 mm T10 Torx screws securing the display to the outer case.

  • The last two pictures are detail shots of each side of the display.

On reassembly, it is REALLY HARD to align those screws, because of the field of the strong magnets that hold the glass cover on. I'm sure there's a trick to it, but I'd love to know what it is for future reference.

Peter Shenkin - Responder

I used needlenose pliers and the T10 to align the screw into the hole. Otherwise the screw keeps jumping to the magnet. And patience with this NON-CAPTIVE screw design (c’mon Apple, even **I** came up with that, and I’m an idiot!)

finnik2d - Responder

Slightly lift the top edge of the display out of the outer case.
  • Slightly lift the top edge of the display out of the outer case.

  • Do not lift it too much. There are several cables attaching the display to the logic board.

When putting the display back I have resistance from the foam elements (on the top end where the iSight is) and have to press down really hard. Is that okay?

gm.konsortium - Responder

Well, stupid me put the 3.5" to 2.5" cage the wrong side up. ;)

gm.konsortium - Responder

Standing the imac upright on its stand really helps this step! Laying it falt makes getting under the panel a real hassle.

finnik2d - Responder

MANTA DRIVER KIT
112 bit driver kit $59.99
MANTA DRIVER KIT
112 bit driver kit $59.99
Pull the vertical sync ribbon cable out of its socket on the LED driver board near the top left corner of your iMac. The vertical sync ribbon cable has a ZIF style end, but the socket has no lock or retaining flap. Simply pull the cable away from its socket toward the optical drive side of the iMac to disconnect it from the LED driver board. The vertical sync ribbon cable has a ZIF style end, but the socket has no lock or retaining flap. Simply pull the cable away from its socket toward the optical drive side of the iMac to disconnect it from the LED driver board.
  • Pull the vertical sync ribbon cable out of its socket on the LED driver board near the top left corner of your iMac.

  • The vertical sync ribbon cable has a ZIF style end, but the socket has no lock or retaining flap. Simply pull the cable away from its socket toward the optical drive side of the iMac to disconnect it from the LED driver board.

The vertical sync cable was snug initially and now is loose. I checked and the cable is intact. Has anyone had experience with making it fit better?

Rajan - Responder

Scotch tape on the upper side and sliding this in helped to secure the cable.

Rajan - Responder

Reassembly of this part was the closest I came to disaster on this project. I tried inserting the connector a few times without success, and when I looked it it the leads, which are fragile, were all mangled. I smoothed them out by hand as best I could and and reinserted, very carefully this time. The trick is that the tip of the connector should be pointed somewhat upwards when reconnecting.

I was pretty sure that when I was done, I would reboot but have no display; but fortunately, everything worked.

Peter Shenkin - Responder

Hi, I still have a question. What is the "Job" of the vertical sync ribbon cable. Thanks

Lutz Blum - Responder

So let’s say someone wanted to suck some of the dust off the back of the display before reassembly. Let’s just say that. Someone would likely suck this forsaken cable up into the vacuum tube then, wouldn’t they? They might. And if it were to oscillate in a rushing torrent of air, it might get munged? It might.

Here’s how you overcome such a disaster:

1) cut the end fresh, as close to the end as you can while cutting off any frayed end.

2) abrade the end gently, repeatedly, along the connector wire axis. I used emory paper. Your goal is to expose the copper conductors in the last 1/4” of the fragile evil wire.

3) Tape a small stiff cardstock to the back of the end of the connector. This is essential to press the connector wires into the connector.

4) Gently insert, taking special caution to not peel the copper off of the connector.

5) Tape that connector down deftly, without letting it move a millimeter and securing it for all time.

sydnius - Responder

I just leave it connected. After disconnecting the other cables, there is enough slack to lay the display on its backside if you’re working on a flat surface.

Duane Johnson - Responder

I have replaced the hdd in this model about 8-10 times - I have never had to disconnect any cables other than the sata and temp sensor cables on the hdd. I just prop the lcd up with an egg carton (or something about 3 inches high that is soft and light) and access the hdd that way. The only thing I ever have trouble with are is putting the LCD screws back in around the magnets - but I have pretty much perfected that with a sissor/ tweezer tool.

Suzanne Levy - Responder

Rotate the display out of the outer case enough to disconnect the LED backlight power cable from the LED driver board. Disconnect the LED backlight power cable by depressing the locking mechanism while pulling the connector away from its socket (toward the bottom edge of the iMac). Disconnect the LED backlight power cable by depressing the locking mechanism while pulling the connector away from its socket (toward the bottom edge of the iMac).
  • Rotate the display out of the outer case enough to disconnect the LED backlight power cable from the LED driver board.

  • Disconnect the LED backlight power cable by depressing the locking mechanism while pulling the connector away from its socket (toward the bottom edge of the iMac).

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Squeeze the two display data cable connector arms together to unlock it from its socket on the logic board.
  • Squeeze the two display data cable connector arms together to unlock it from its socket on the logic board.

  • Pull the display data cable connector away from its socket on the logic board.

in Step 7, my connector (new 21.5 iMac - Dec 2010) was not attached that way and just came of easily.

erin - Responder

Aperte as duas exibição do conector do cabo de dados braços juntos para desbloqueá-lo de seu soquete na placa lógica.

Darlan Perira da Silva - Responder

I accidently broke the data cable socket on step 7. Any advice on what i should do?

Sam Tang - Responder

I feel pretty silly. I spent wayyyy too long trying to get these cables disconnected. Happy I found this guide; hopefully, I won't struggle with such simple things since you provide pretty good details! Thanks.

J.w. - Responder

Pas beaucoup de place pour déconnecter ce cable ! En essayant d'ouvrir trop l'écran pour passer mes "grosses mains" j'ai cossé le connecteur : je suis dans le caca :-( (et pourtant j'en fait des démontages !) Alors ATTENTION !!!

divers - Responder

Il vaut mieux déconnecter la partie du côté écran en premier (sous l'autocollant noir)

divers - Responder

Disconnect the LCD thermal sensor cable connector from its socket on the logic board.
  • Disconnect the LCD thermal sensor cable connector from its socket on the logic board.

  • If your fan is spinning full speed after completion, check this connection or the hard drive's thermal sensor cable.

This is important regarding the fan running full speed

http://blog.macsales.com/19617-diagnosin...

tobykirkland - Responder

Is there a way to test the power supply to see if it's dead?

professorminh - Responder

Achtung! Dieser Stecker kann sehr fest sitzen, hier hilft ein guter Fingernagel um den Stecker abwechselnd rechts und links zu Hebeln

bluesoundsmusic - Responder

Carefully pull the display toward the top edge of your iMac and lift it out of the outer case, minding any cables that may get caught.
  • Carefully pull the display toward the top edge of your iMac and lift it out of the outer case, minding any cables that may get caught.

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Remove the two 9 mm T10 Torx screws securing the LED driver board to the outer case.
  • Remove the two 9 mm T10 Torx screws securing the LED driver board to the outer case.

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Lift the LED driver board out of its recess in the outer case, minding the DC-In cable still attaching it to the power supply.
  • Lift the LED driver board out of its recess in the outer case, minding the DC-In cable still attaching it to the power supply.

  • Disconnect the DC-In cable by depressing the locking mechanism while pulling the connector away from its socket on the LED driver board.

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Conclusão

To reassemble your device, follow these instructions in reverse order.

2 outras pessoas concluíram este guia.

How does someone tests to see if a LED Driver Board is broken or not?

chilbig - Responder

Same question as above, how to check if it's power board or LED driver board that is damaged?

clovisonofri - Responder

It might not be a complete answer but I had to change my LED Driver Board when my display went black ( as if the computer was in sleep mode ) as soon as the computer was on. I had to push the power button to get the screen back multiple time. There was also a problem with the graphic card but even after changing the GC, the screen would go black. We figure it was the LED Driver Board when we realized the computer wouldn’t show anything on an external monitor. Hope it helps :)

Mary - Responder

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