My LCD monitor goes into sleep mode can not be re-activated

Users questions: My LCD monitor goes into sleep mode can not be re-activated, restart the computer can not display. Must be off after 10 minutes, allowed to cool to function properly. If the properties, select "never close" you can have displayed properly. A host for the test, the same symptoms. This is even What reason?
Experts answer: can not activate the sleep of course. Do not sleep. With the screen saver on it.
  • This information provided by the users.Thanks!