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Part Number: LM2904-Q1

We found Lead abnormality: Seems as the pin color is not normal, looks brown. Can you advise the possible of Lead abnormality? 

If the pins of the IC have this color, this can be a sign of corroded pins, burned substance on the pins or overheating during the soldering process. This means that it can affect the soldering quality of the PCBA and then the reliability of the product.