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flashing notification light on xiaomi redmi note 7 after water damage

my phone had a cracked back and it has water damage and now the notification light is flashing the screen dose not light up and when it first fell in the water it worked fine than after 1 or 2 hours the screen flickered a bit and stopped lighting up now the notification light blinks when i put the charger on

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Hi,

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. 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 and be gentle when handling and especially when brushing away the corrosion. You do not want to remove any components from the boards. Remove the shields that may be covering some components as the water may have got in under them as well. The ends of any flex cables and their connectors need to be cleaned also.

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

Here is a link to a teardown video for the phone which will help.

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. It isn’t going to get any better by itself.

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do you know what the flashing notification led means

por

Hi @Yos

With water damage it may just mean that there is a path for the electricity in the phone that shouldn't be there so it may mean nothing really but is just a symptom of the problem.

Don't worry about it. Remove the battery as soon as you can to minimize any further problems from occurring.

The thing to be concerned about is after you have properly cleaned it to see how it operates then.

Good luck

por

can i chack if the lcd or other parts are still working useing a multimeter

por

@Yos

Not until after they have been cleaned etc as you don't want any power at all on the board or screen etc

por

so thats a yes. and do i use ohm setting

por

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