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모델 A1311 / Mid 2011 / 2.5 & 2.7 GHz Core i5 또는 2.8 GHz Core i7 프로세서

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Broke power button connector on logic board

Working through an ssd upgrade and the wires popped out of the connector that I believe is the power button connection on the logic board. Wires are still in good shape, just need to replace the connector but having trouble finding it. Could also hard wire the wires back to the board, but not sure of polarity. Is there a way to test? I know the power putton is just a small voltage switch that triggers a relay.

Also, is it safe to power up the device without the screen installed? just for the sake of having to re-dissassemble if I get the polarity wrong.

Here’s my shoddy pic

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Update (03/25/2019)

Sure thing. I can’t find the little black connector that these exposed wires were harnessed into, it got fairly obliterated during removal. So perfect solution would be to find a replacement connector and just get these wires back into there the correct way.

I understand this pin out is simple a toggle for the power switch, and was thinking of soldering them directly back to the board. I was told polarity shouldn’t matter, which is an issue since I dont’ know which wire came off which terminal.

Taking another look tonight, however, i realize its going to be a super tight area to try and solder into. So I’m basically looking for a coupling solution, hopefully the original part but any other ideas are very welcome. Pics below

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Can you try a few more pics as its hard to see whats damaged. Use a book or other object to steady the camera on and add a bit more light. Take a pic of the board and one of the cable connector end and the loose wire.

Much better!

Any thoughts?

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@deadimacs

the connector is a Molex 53261-8602. Here is the schematic of how it is connected and “wired”.

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Looks like connecting pins 1 and 2 would bridge the switch

Update (03/27/2019)

53261-0271 is a 1.25mm Pitch PicoBlade Header, Surface Mount, Right-Angle, 2 Circuits, Tin (Sn) Plating. Here is the engineering drawing for the connector.

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The Molex 53261 connector series goes up to 17 circuits. Check the last line of the legend on the right. It will show you the dimension of the connector needed for your logic board. Do not rely on stock images to determine the connector

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That's awesome info, thanks. The receptacle on the board basically fell apart during repair attempt, so unless I can find the whole part (plug and receptable) this project is gonna be more "experimental". Gonna have to finally replace this beast as I don't wanna plunk down almost four hundred bucks for a new (used) logic board.

Maybe I'll pull the logic board out and try to pin out from the other side, but I guess its time to get a new production machine.

Are both parts damaged? From the photos, it seems that the receptacle on the motherboard is OK, but maybe I'm not seeing it right.

That having been said, it looks like the receptacle is surface-mount. If so, you're not going to be able to solder from the other side. But (again, based on your photos) it seems like the pins from the receptacle are exposed so you might be able to solder a new receptacle to the board if you have steady enough hands to do that.

As for the wire, if you can get a new plug, it shouldn't be that hard to attach it to the wire. The only real concern here is if there is enough slack for you to cut off the damaged end and and still have a long enough cable to reach where it needs to go.

Unfortunately, Google searches for Molex 53261-8602 either fail to produce a link with an image or they find completely different parts, so its hard for me to say much more than that.

Great info guys, thanks. The board is exposed enough to solder directly on. It’s just the metal is pretty well demolished. I’ll see if I can pull of a soldering miracle

Those dimensions are making sense now...gonna order one and see where the journey takes me. THanks everyone!

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Sorry to bring up an old thread

Restoring a broken 2011 iMac and found the power button connector was absolutely chewed up inside, the cable came away with no resistance leaving the two terminals free, it took a while to free this broken connector from the molex

Is it a 2 pin JST SH connector? I assume I can just order a new head for it?

Edit:

You can see it in Step 29 of this guide — Installing iMac Intel 27" EMC 2429 Dual Drive Kit (HDD or SSD)

Edit 2:

I think I’ve found it, the part is 51021-0200

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Sorry, checked my email but I can’t remember exactly what connector I ended up getting but it worked…somebody on this thread gave me the part number if you read through the comments.

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