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Battery replace now after thermal paste replacement

I've just replaced the thermal paste of my 5 year old MacBook Pro because it was running at over 85 degrees celsius when doing normal work.

I dediced to follow the instructions and disconnect the battery before doing this but now the battery is not recognised anymore and I can't power on or use the MacBook without a power connector.

For some reason I can see all information regarding the battery in the OS e.g. temperatures, cycle count, manufactures etc. but can't use the battery.

SMC and PRAM resets have been done as well.

Is it possible I damaged the battery Interposer and that's why it won't work anymore?

This step shows it:

MacBook Pro 13" Retina Display Late 2012 Heat Sink Replacement

I've accidently made some small scratches on the on the logicboard when removing the Interposer, it doesn't look deep or something like that but maybe it's too much. Did I break it and should I order a new Interposer or did I break the connectors on the logic board (although it doesn't look fragile)

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Coconut battery shows Battery failure Yes en macOS battery status poor

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13 Comments

Can you take some detailed pics of the area you may have damaged so we can see. Here's how to post them: Adding images to an existing question

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@danj Hi sorry, I've attached these now, those are as clear as I can get them from my camera.

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Was able to take a better image, in this light it looks a bit worse I must agree. Is there still a way to fix this?

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The board looks OK from what I see here. Did you damage the interposer board? Take a look at it to make sure the pins aren't damaged.

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I've added some extra photos of the interposer. With dame, do you mean checked? I can't see something strange although I'm not 100% sure

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Examine your board where the heat sink ends are crimped and look for an oily type of residue. If you find it, your heat sink liquid has leaked and you will need to replace it.

MacBook Pro 13" Retina Display Late 2012 Heat Sink Replacement

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I don't see any liquid or something like that. I just removed the heatsink again to be sure. The system only does not run from battery, power is fine, no issues there and ~20 degrees celsius cooler than before the swap.

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You won't see liquid, just an oily type of residue stain.

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Checked again, don't see or feel anything like it.

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Try using TG Pro free software to see if you can find the temperature anomaly: https://www.tunabellysoftware.com/tgpro/

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Just tested TG Pro, it doesn't report any bad temperatures. The CPU temp issue was fixed when I replaced the thermal paste. Others were fine. It even reads the battery temps (30 degrees celsius) but I still can't use the MacBook without power.

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Fredrik Johns will be eternally grateful.
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