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I think I tried everything already. Removed the GT730 and connected the monitor to the onboard video (Intel G33/G31). Also disconnected the DVD and 2nd HDD from the power supply. Unfortunately, the result is still the same - the monitor doesn't wake up from sleep. I also connected the monitor to my laptop via HDMI cable to test if it will wake up. Once I just closed the laptop (the screen down to the keyboard), the monitor went to empty "no signal" black screen as well together with the laptop. Then when I opened the laptop, the monitor showed up together with the laptop. So the monitor is ok. Of course, during laptop sleeping, the monitor keeps staying ON, i.e. doesn't go to standby mode as it should if it was connected via VGA cable. Let me know if I am wrong, but as long as I know and tested before, a PC can't let a monitor go to standby mode via HDMI as if as connected with VGA cable. Right? But will a PC turn off automatically a monitor (sleep) via DVI cable or Display port-to-VGA cable or Display port-to-DVI cable?

Where and what exactly to look for in the BIOS? I've never played with anything in my BIOS. In Device Manager everything is ok. I tried with HDMI cable 2 week ago. The same result - empty black screen, with the only difference that the monitor doesn't go automatically to standby mode as with VGA cable. The VGA cable is VGA to VGA (15-pin) which I use 10+ years. Last month I also tried with my old CRT monitor connected via its own VGA cable - absolutely the same black screen and going to standby mode too. I've also tried attaching the monitor to the MB graphics VGA output. Even after PC fresh start or restart the monitor doesn't respond at all, staying in standby mode. Just an absolutely unprecedented problem.

What do I have to do when ASUS P5KPL-VM won't wake up the monitor? The monitor goes to sleep mode once I sleep the PC as well. When I wake up the PC, everything works (mouse, keyboard, fans, HDD, etc.), but the monitor stays in standby mode and doesn't wake up. When I force the monitor ON, it stays on black screen and after few second goes to standby mode itself. The monitor is connected to nvidia geforce gt730 via VGA cable. I tried with another monitor with its own VGA cable and the result is the same issue. This started since last December and until now the only possible action is to switch off the power of the PC and then to power on. Then, when the PC runs, the monitor is on too. Through all the time I red and tried tones of suggestions: power plans, advanced power options, drivers, etc. and nothing helps. Any help and ideas about how to fix this terrible problem? Big thanks in advance!