HP 394303-002 - Daughter circuit board - Contains the USB port and S-Video controller (RS482M) for full-featured models Retail
HP 394303-001 - Daughter circuit board - Contains the USB port and S-Video controller (RS480M) for full-featured models Retail
HP 418489-001 - Daughter circuit board - Contains the S-Video controller for de-featured (DF) models, RS482M Retail
HP 395373-002 - Daughter circuit board - Contains the S-Video controller for de-featured (DF) models, RS482M Retail