The motherboard is one of the centerpieces of every PC — for better or worse. Motherboard problems can affect a variety of components and are not always easy to diagnose. One of the first signs of a possible motherboard problem is the failure of the POST (Power On Self Test), which is carried out when the computer is started. A failed POST may indicate a faulty motherboard. However, it is difficult to determine the exact cause. Errors such as “Inaccessible Boot Device,” defective RAM, or other component errors are possible. Some systems use special acoustic signals to identify which component …