The monitor that came with my computer doesn't sleep on shutdown or computer standby. This is particularly annoying since it's an LCD, so the monitor is black but the backlight is still on. I know the monitor can sleep, which it does when I unplug the monitor cable (the DVI cable, not the power cable), use a tool, or when it reaches the inactive time set in my power plan. Specs:
HP Pavilion Elite e9262f
Memory: 6 GB
Video Card: ATI Radeon™ HD 4650
Monitor: HP L2445m
If it's not possible to have the monitor power off with a setting of some sort, is it possible to set Windows to run a task that turns off the monitor when it goes in standby or shuts down?
Edit: I think this is something wrong with the motherboard or video card; it's not sending a DPMS power off signal to the monitor, it's only sending a black screen.
Edit: There is also no option to change this in the (bad) HP BIOS.
Edit: Unplugging the DVI cable does not work, apparently.
Best Answer
Check if your BIOS has an entry similar to "Video Off Method".
If it doesn't, maybe a BIOS update if available can help (but to be done with extreme precaution, as failed BIOS update can brick the computer).
Quoted from Power Management Settings :