ALC662 is a High Definition (HD) Audio Codec IC by Realtek Semiconductor, widely used on older desktop motherboards based on Intel and AMD chipsets. It provides standard onboard audio for speakers, line-out, line-in, microphone, and front-panel audio on legacy PCs.
In repair scenarios, a failed ALC662 typically causes no sound, missing audio device, distorted output, or mic issues. While this is an older desktop codec, it still sees occasional demand from repair technicians servicing legacy systems.