一、引言计算机上的硬件逻辑电路板在生产过程或者使用过程中,由于电路失效或生产工艺不良会产生各种类型故障。为了发现故障,必须进行测试。通常,对于故障的测试有两种方法:一种方法是将出故障的插件板上机实测。通过机器自检诊断程序,将故障诊断定位,然后排除故障。如果被测插件板是某一系统中的“核习”板(即CPU),那么,故障将导致 First, the introduction of computer hardware logic circuit board in the production process or the use of the process, due to circuit failure or poor production process will produce various types of failures. In order to find the fault, it must be tested. In general, there are two ways to troubleshoot a problem: one way is to take the faulty board on board. Through the machine self-diagnosis diagnostic procedures, fault diagnosis positioning, and then troubleshooting. If the board under test is a “learning board” (ie, CPU) in a system, the failure will result in