Asus Xonar U7 - with defect

Note: the sound card only works when it heats up; I can add little more about this fault, but audio is only available after the PC has been powered on for a considerable amount of time. Otherwise, I add that it delivers good sound quality. Ideal for those who know how to repair this type of device. Fixed price. Transaction in person, preferably in the Porto or Valongo area.