After the computer boots, only 2 sets of fans in the switch?

Users questions: After the computer boots, only 2 sets of fans in turn, (CPU and power of the * case, only two fan) chassis green light lit, the other did not react. Who can help analyze the next ah? Thanks. Finger is connected with the socket part of it? Rubber is the kind of students do?
Experts answer: to graphics and memory Pull down the finger with a rubber wipe and putting it back should be able to solve the problem.
  • This information provided by the users.Thanks!