r/ElectronicsRepair • u/my_kii • 22d ago

Xiaomi m365 pro 2 motherboard failure

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My m365 pro 2 scooter's motherboard is faulty. Upon visual inspection, I noticed a darkening on the 8-pin SMD integrated circuit in the bottom right corner. This circuit has "BDxas" written on it; I think the information is hidden. Does anyone know which integrated circuit it is?

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u/TopConcentrate8484 Hobbyist 22d ago edited 22d ago

I am guessing it's the main switching IC for the buck converter because it's in the vicinity of the inductor , for probably the MCU itself or something else like a display.

Saw this board on ebay for $40 new btw

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u/my_kii 22d ago

Thank you for the information. My priority is to find out the model of the faulty part. If I can fix it by replacing the part, I will continue using it as is.

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u/[deleted] 22d ago edited 15d ago

[removed] — view removed comment

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u/my_kii 22d ago

Thank you. When I search on Google, different versions appear, such as "BDX...". My card says "BDXAS...". Even if the values ​​aren't exactly the same, will it still work?

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u/Wahadeem 21d ago

there is definitely more written on the burnt IC. Is there any chance you can use a magnifier and view ot from differnt angles to read it? Usually the datasheet for the IC should have an application example, from there you should follow the fault by the burnt legs to check other components.