Monitor dims without warning.

Monitor screen darkens without warning.  Desktop agents is the control screen to turn black or is the Dell Trinitron monitor at the end of its service life.  The screen stays black for odd times.  Black screen time duration varies from five minutes to 45 minutes.  The display returns to its normal brightness after that which precedes, noted the dark period.  The black sessions initiate the display shows normal after black periods without any warnings.  I'm puzzeled and would appreciate your comments.  Thank you.

Hello

  • What were the changes made before the issue occur?
  • What version of Windows are you using?
You can refer to the following steps:
Step A.
a. restart your computer.
b. when the computer starts, you will see your computer hardware are listed. When you see this information tap the F8 on your keyboard key repeatedly until you are presented with the screen Windows 7 Advanced Startup Options.
c. using the arrow keys, select the desired option of Mode without failure.
d. press the Enter key on your keyboard to start in safe mode of Windows 7.
e. when Windows starts, you will be at a typical logon screen. Connect to your computer and Windows 7 goes into safe mode.
f. do whatever tasks you need and when you are done, reboot to return to normal mode.
 
Step B.
If it works fine in safe mode try performing a clean boot in order to find the cause root.
See the article below for instructions on how to start your computer in a clean boot state.
How to troubleshoot a problem by performing a clean boot in Windows Vista or in Windows 7
http://support.Microsoft.com/kb/929135
Note: When the diagnosis is complete, don't forget to reset your computer to normal startup. Follow step 7 in the above article.
See also:

Tags: Windows

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