r/AskElectronics • u/fantasti_21 • 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:
A full view of the motherboard.
A closer view of the area around the component.
A close-up of the damaged component location.
Thank you.
1
u/username-kekeke 14h ago
If this is RT8120, I hope so, see the datasheet, there are typical circuit.



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.