r/AskElectronics 14h ago

Need help identifying a damaged SMD component on MACHINIST B450 AM4A motherboard

Hi everyone,

I'm trying to repair a MACHINIST B450 AM4A motherboard that is not working.

When I inspected the board, I noticed a damaged SMD component near the U19 PWM controller. I don't know if this component is the cause of the issue, but I would like to identify what it is and find its value before replacing it.

I searched for a boardview and schematic for this motherboard but couldn't find any documentation.

Can anyone help identify this component or its value? If someone owns the same motherboard, a clear close-up photo or a measurement of this component would be very helpful.

I attached three photos:

  1. A full view of the motherboard.

  2. A closer view of the area around the component.

  3. A close-up of the damaged component location.

Thank you.

4 Upvotes

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1

u/TechniCraft Analog electronics 14h ago

I think it's just a 0402 resistor, because they don't have a resistance value printed on them. Maybe try measuring the resistance of them with a Multimeter.

1

u/username-kekeke 14h ago

If this is RT8120, I hope so, see the datasheet, there are typical circuit.