I have an HP Monitor (Model C4D33AA, with DVI) that had no problem working with my HP Pavillion desktop until the motherboard fried; now I have a very new ASUS desktop computer (Win 7, HDMI, VGA). Once I bought a DVI to HDMI cable, the monitor worked fine... for about a week.
After turning on the computer, a few initial startup screens or text can be seen as the computer starts. However, the Windows desktop never opens. Instead, I get the "Monitor Going to Sleep" message.
The monitor works in safe mode. (One page suggested that if so, "it's either a driver, or more likely too high a resolution set.")
Another monitor works with the VGA connection.
Once I started fooling around with the advice received from the help pages regarding this topic, the HP monitor now reads "Active" for the DVI setting. Before, there was "No Signal."
One of the bits of avice was to update the driver. Through HP's site, I did. The monitor is still going to sleep.
The HP site has a page that addresses this problem. As far as I could understand what was being said, the advice did not help.
I have fooled around with the "power" settings, as well as the screen resolution. These have been part of the usual advice. The monitor itself has some settings that has not helped with solving the problem.
Another bit of advice is to update the BIOS, but I don't think that is the problem given that the computer is so new. (Besides, I have a fear regarding BIOS changes.)
A commenter from this page suggested, "This has been a known issue since I got my HP panel screen 5 years ago. It's been found to be a 'bug' rather than a fixable issue as far as reinstallation of video cards and such."
Another suggestion with potential value: "Issues like this are almost always with the computer, not the monitor. If you get a no signal message it means the monitor is on but no signal is coming to it. Check the video cable. If that does not work, try another monitor. People see the monitor say "going to sleep mode" and think it's the monitor issue that it's doing that, the real issue is that the monitor is not getting any video signal so is going to sleep mode."
Someone solved a similar problem by hooking up to the VGA connector, and perhaps that will be a solution in my situation (DVI-D to VGA), but I guess there will be quality loss. Besides, shouldn't there be a straightforward solution?
EDIT: Afterwards, looked around and this option is complicated and expensive, with varying results for users.
What a peculiar and particularly frustrating situation... it's weird. Perhaps your experience will pinpoint the right steps to take.
Edited by Upbloat, 09 July 2015 - 12:01 PM.