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Troubleshooting, device, and repair guides for the 2016 Samsung Galaxy J7, model number J710.

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Why my speaker not working when it was going in water

It was not working after getting wet.

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Hi @burhanah

The impurities in the water causes corrosion and provides circuit paths for the electricity which were not in the phone's operating design and could damage the components. The corrosion starts immediately and is ongoing until it is completely cleaned away

First do not try to charge or to turn on your phone and then remove the battery as soon as possible from the phone to minimize any further damage.

Then you need to dis-assemble the rest of the phone and clean all the affected parts using Isopropyl Alcohol 99%+ (available at electronics parts stores) to remove all traces of corrosion and water. If possible do not use "rubbing alcohol" as in some cases this is only 70% IPA or less, can contain additives and is not as effective. If you do have to use it check the label to verify the amount of IPA. The higher the percentage of IPA the better

Here is a link that describes the process. Electronics Water Damage

As always with electronics, especially surface mounted pcb be gentle when handling and especially when brushing away the corrosion. You do not want to remove any components from the board. Remove the shields that may be covering some components as the water may have got in under there. The ends of any flex cables and their connectors need to be cleaned as well

Hopefully after you have done all this the speaker might possibly work correctly again.

Here is a video that may help. The speaker can be seen being from at 2:20 minutes into the video.

If the speaker has been damaged it will have to be replaced. search online for Galaxy J7 2016 loudspeaker, to find suppliers that suit you best.

If this process seems too daunting, take your phone to a reputable, professional phone repair service, experienced in liquid damage repair and ask for a quote for a repair. If you decide to do this, do it sooner than later.

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Dear Burhan Ah,

You should heat up your motherboard and clean it thoroughly.

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Burhan Ah zal eeuwig dankbaar zijn.
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