Why not start your computer

Users questions:My computer will not start, boot display after the first green light to continue after a few seconds into the yellow light, and the usual host of different startup sound, continuous hum to the sound, next to the red light does not shine, driving lights do not light. Sometimes the computer can start, sometimes not start, it has a relationship with the under-voltage. System has two heavy equipmentTimes, should not the system problem?
Experts answer: upstairs talking right, may be one. Bad patch cable 2. Memory * graphics hardware such as plug problem, remove the cleaning is also possible: 3CPU bad contact, you can re-plug look.
  • This information provided by the users.Thanks!