I have dropped mt phone in water now it turned black, what should I do
water damage what to do it turned black
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As you know water and electronics and electricity are not a good mix.
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.
First do not turn on your phone and with the phone turned off you need to remove the battery as soon as possible to prevent 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 from electronics parts stores) to remove all traces of corrosion and water. Do not use "rubbing alcohol" as in some cases this is <70% IPA, can contain scents and is not as effective. If you do check the label to verify the amount
Here is a link that describes the process.
As always with electronics, especially surface mounted PCBs be gentle when handling and especially when brushing away the corrosion. You do not want to remove any components from the boards.
Hopefully after you have done all this the phone might possibly work correctly again.
Here is a link to the ifixit Huawei Honor 9 Repair guide(s)which may be of some help.
If this process seems too daunting, take your phone to a reputable, professional mobile phone repair service, experienced in water 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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