如果通过前面三步的排查,您的问题仍然没有解决,那么可能就有些麻烦了。不过不要紧,我们还是有办法对付的。此时,应该首先明确故障类型是属于那种情况,然后作相应的处理。请看第四步—— If you pass the investigation in the previous three steps, your problem is still not solved, then there may be some trouble. But it does not matter, we still have a way to deal with. At this point, you should first clear the type of fault is that kind of situation, and then make the appropriate treatment. Look at the fourth step -