Display did not reflect how to solve?

Users questions:Press Start button, indicator light, the hard disk light does not shine, the fans are normal turn, displays no signal, the keyboard has no signal, only the mouse a signal. I had not pull out the alarm memory. I suspect the problem is the motherboard. Who knows how to solve problems acridine?
Experts answer: This is generally not the work of boardMay be a short circuit board situation, sent to the after-sale check, or is the virus, resulting in damage to the motherboard's BIOS.
  • This information provided by the users.Thanks!