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Processeur 1.86GHz ou 2.13 GHz, Flash Storage 128GB ou 256 GB

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LED Driver model number? Screen flickering

I have a late 2010 MacBook Air that was functioning quite normally until recently the screen is basically jumbled/glitchy, though the unit itself hasn’t sustained any damage. SMC and PRAM resets haven’t solved the issue, but it is possible to log into the device from another Mac and screen sharing shows that the internal computer itself is functioning just fine. A few google searches suggest that the LED driver IC needs replaced. My only problem is that I can’t find the model number of the actual part I need to order… I’m finding several chips for sale that are for subsequent MacBook Air models, but nothing for the MC905LL./A, A1369 model that I have.

Any ideas if I’m barking up the right tree here?

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Locate the board number on the logic board 820-xxxx

Let us know what it is.

par

Dan thank you. It’s hard to see the numbers (if I’m looking in the right place, partially covered by the SSD bracket?) 820-2838-A.

Also, if the contacts on that cable are corroded, it’s really hard for me to tell. Is it something I could clean?

par

Thats the correct number for the logic board, so search for the schematics and boardview drawings so you can see how your system works.

From what it sounds like you're jumping in the deep end without the skills as well as not have the needed tools to attempt repairing your system at this level.

If you can't tell if your connections are good, then I would stop and find someone with the skills and proper tools to fix your system. This is not an easy fix if the driver logic is bad.

Again, I mostly find corrosion or a cold (bad) solder joint for this kind of problem. I would strongly recommend to focus there not the driver chip its self.

par

@danj you are probably correct. I have disassembled (and successfully reassembled) several MacBooks, iMacs, and iPhones, but only on one occasion did I do a board-level solder job (on an iPad). I thought the solder job on the Macbook might be similar, but if it comes to interpreting complex schematics I'm out of my depth. In general I can tell if connections are badly corroded, but the minute details of the connections in question make it pretty tough for me to to tell, though from what I can see all the pins on both sides look clean. I tried to upload a photo here but I'm not sure it went through. I was originally thinking I could do the solder repair of the logic driver since I did something similar on the iPad, but the hardest part has been knowing if that's really the problem and what the replacement part is for sure.

par

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I would inspect the LVDS cable and its connections on both the main logic board as well as the panel side as often I find the connections are corroded up.

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I would then check the logic board for corrosion as well as look for a cold solder joint around the driver chip and the components around it. You may want to check out the voltage on a scope to see if its jumping around referencing the schematics and board views.

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f2point8 sera éternellement reconnaissant.
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