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15" laptop manufactured by Dell at the end of 2016. The laptop is very configurable, uses 7th generation processors and has a grey plastic chassis.

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Instructions showed wrong cable for power - Did I kill it?

I followed the instructions for replacing the display assembly, but found out that the indicated cable for the battery was the display cable. When I was reassembling it, there was that little pop and ozone we don’t want to smell. I can’t get it to power on now. I’ve tried reseating the battery and display cables, but it still won’t come up. No indicator lights, no beeps, no fans.


What’s needed to salvage this situation?

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crwdns2934051:0crwdne2934051:0

Hi,

Unfortunately it seems as though the motherboard may have suffered some damage.

Did you disconnect the battery from the motherboard before you started replacing the display assembly? Not as per the incorrect display guide, but as per the Dell Inspiron 15-5567 Battery Replacement guide?

You will need to use the motherboard schematics to diagnose what the problem is.

If you decide to do this then please check that the laptop’s motherboard board number (found printed on the motherboard itself) is the same as in the link provided i.e. BAL20 LA-D801P-REV1.00 A00 to ensure that they are the correct ones for the motherboard. If it is not the same board number as your motherboard, search online for (insert motherboard board number) schematic to hopefully find it

You will need to have a DMM (digital multimeter) and know how to use it and also how to read schematic diagrams to diagnose what is wrong.

If this seems too daunting then contact a reputable laptop repair service and ask for a quote for the repair. The alternative is to buy a replacement motherboard and install it in the laptop. Search online for Dell i5 5567 motherboard to find suppliers.

For future reference and it is meant with the best intentions, always remove or disconnect the power source from an electronic device, be it a power cord or a battery or both, and verify that it is disconnected, before working on the device. In the case of an internal battery as soon as it can be safely accessed. Once the power has been disconnected then commence the repair. Then only reconnect the power source as late as possible in the re-assembly procedure or after the repair is complete to avoid any electrical problems occurring due to accidental contact with the components when using tools etc.

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crwdns2942205:01crwdne2942205:0:

I agree. I practice proper power safety, and regardless of the original intent I let myself be misled by the labeling in the tutorial. Because I was careless or tired, I didn’t get that nagging feeling something was wrong with the instructions until it was too late :( Why check for a second set of instructions when you have some from a reputable site already?I’ll probably just replace the mobo. While I might be able to find the popped fuse, I can’t do SMT soldering.

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You have just accidentally put the wrong one on the incorrect cable. When this happens, it could damage the battery as well as other associated electrical components. You may just remove the battery and troubleshoot your device.

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Hi @v3nuo ,

I edited/ corrected the ifixit repair manual when I saw the question before as it showed at Step .1 in the Display Assembly repair guide for the device that the Display cable was labelled (incorrectly) as the "Battery" cable as it also was in the instructions at that step, i.e. a typo.

The OP followed the guide and assumed it was correct. instead of checking that the battery was disconnected properly first

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@jayeff Thank you for your clarification.

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