The computer starts and the monitor instantly goes into sleep mode and cannot be restored. It first shows that there is no inputs and goes into sleep mode

SOURCE: Monitor goes into sleep mode after a few seconds

Recently, my desktop monitor goes into "power safe mode" as soon as the Windows XP logo appears after the POST on my Dell Precision 370. The computer continues to run. I was able to go into safe mode, and all the devices seemed to be active, especially the nVidia graphics driver. The video settings in the BIOS were also correct along with power management settings. I even tried different monitors. At this point, it seemed as though the graphics card might be faulty.

The last suspicion was the graphics driver, so I uninstalled the graphics driver in device manager: Control Panel > System > Hardware > Device Manager, and when I rebooted the computer, I was able to log into Windows normally. When I went to see check the status of the graphics driver in Device manager, I noticed it re-installed the same driver, but this time it installed correctly and I was able to access the nVidia graphics utility.

If the driver does not roll back or re-install automatically, just download the latest recommended or urgent video driver from Dell or whatever mfr while in safe mode w/ networking or on a flash drive, and install the driver in safe mode, reboot and hope for the best.

* If you have any specific or 3rd party display utilities, disable or uninstall the utility in the startup as they may be the cause.

Good luck!

SOURCE: monitor goes into sleep mode

how do you go into the control panel when the monitor won't get out of sleep mode???