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The Samsung Galaxy A31 is a mid-range Android device released by Samsung in April 2020. Identifiable by model numbers SM-A315(F, F/DS, G/DS, and G/DSL).

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My samsung a 31 is not working

My samsung a 31 is not working

Once a time I'm coming to home on that day

There was heavy rain. My phone works correctly at that night.

On morning it's not working the screen is showing black...

Sooo pls answer my question

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If the phone got wet due to the rain then there's a chance that it got into the phone somehow and has caused the problem.

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 phone might possibly work correctly again.

Here is a link to a teardown video for the phone that may 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.

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What if the screen is just not working without any potential water damage


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Hi @bjornmccann

If the phone still works even with no display e.g. vibrates on startup, rings on incoming call and if it hasn't gotten wet or been dropped then the phone would need to be opened to find out why there's no display.

Once open check if the display flex cable connection is secure and if so then there are two choices.

a). Temporarily replace the display module (Samsung part # GH82-22905A GH82-24455A GH82-24406A GH82-22761A)¹ and check if that works in case it is a faulty display module.

b). Follow the flowchart from the service manual (images below show testing flowchart and components mentioned in flowchart. Components shown twice, once enlarged and then the board where they're located)

Here's a teardown video that may help.

¹ These part numbers are for a SM-315F model. If your model is an SM-315D or SM-315D or DS I'm not sure if it uses the same display module or not as I cannot find the Samsung part number for them. Search online using the model number to find suppliers. With the SM-315F search using the part numbers to find suppliers.

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If doing this yourself is too daunting, contact a reputable, professional mobile phone repair service and ask for a quote.

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ghalib pasha sarà eternamente grato.
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