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Windows 7: Monitor randomly enters power save mode within 3 minutes of startup

14 Jun 2015   #1

Windows Home Premium 64 bit
Monitor randomly enters power save mode within 3 minutes of startup

Since today my custom built computer has been having issues with all the attached devices.

I left my computer on so that I could watch a stream on, I paused the stream and left my computer running without being used for about 3 hours ( the only thing running was google chrome and like 3 tabs). Upon coming home I saw that my computer had entered power saving mode, that is the lights were all yellow and the screen was black but I couldn't get it to wake up again. On top of this, my mouse and keyboard were also shut off (none of the LED's were lit on either device) and no sound was playing (I had left the stream unpaused the whole time). The only thing I could do was to hold down the power button of my computer and restart it like that. Once I restarted it, everything was working just fine; windows started and I could log in and do things for around 10 seconds to 3 minutes until my monitor "entered power saving mode" again, and this would happen every time I restarted my computer. I also took note that a few seconds after my monitor shut off, my keyboard, mouse, and sound would all stop working while the actual computer itself kept running (The fans were still on, the LEDs from the motherboard were still lit.)

I've looked through many threads on various forums and the only problem they address is the monitor shutting off randomly, but I haven't found a thread that deals with the other devices as well. Another issue is that if I do have to change some settings on my computer I only have like 30-90 seconds to do so once I log in.

This problem happened before as well when I had an i5 2600k processor and an EVGA P55 LE motherboard. I recently switched to my current motherboard and processor within the last month and no problems were had until today. I tried to see if swapping my 750W Corsair Power Supply for my old 500W Thermaltake Power Supply would fix anything, but it didn't.

I don't have another computer to use so this is infuriating. I can try to clarify whatever is unclear but I'm honestly not very computer-smart beyond putting hardware together.

My System SpecsSystem Spec
15 Jun 2015   #2

Windows 7 Ultimate x64 SP1

If it is happening on two different builds, I guess some software you are using?

Try Safe Mode.
And clean startup Troubleshoot Application Conflicts by Performing a Clean Startup
My System SpecsSystem Spec

 Monitor randomly enters power save mode within 3 minutes of startup

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