Disable "Blinking" Light When Powering Down Computer Into Sleep Mode

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  1. Posts : 2,885
    Windows 10 Pro for the Bro

    Disable "Blinking" Light When Powering Down Computer Into Sleep Mode


    So for the longest time ever, I customized a method to whenever I want to power down my computer and then start it back up again, it would reload everything that's already open. When I run this little custom "script", it enables Hibernate mode (where Windows creates an 8 GB hiberfil.sys file, taking 20 seconds or so, in the root of C:\, and the computer powers off). Then when I turn on the computer, it takes about 20 seconds to load up from the Hibernate state, and the hiberfil.sys file gets deleted once the computer reloads exactly where I left off, with all programs that are already open, which is really cool and convenient. I really love that little setup that I have, and the loading time doesn't bother me at all really.

    But: I am aware that over a period of time, it is possible that an SSD drive may get damaged slowly whenever files are created and deleted and whatnot. So I looked online to see the method of setting the computer to go into Sleep mode. I found this:
    "RUNDLL32.EXE powrprof.dll,SetSuspendState 0,1,0"
    and tried it. The computer shuts off almost immediately (I am aware that it doesn't create a huge useless file on the drive, and everything is saved in the RAM), and once I turn it on, it loads up very quickly with everything that I left open. So this method is almost exactly like Hibernate, but more "efficient", obviously. My only issue is that once I put the computer to Sleep, the LED light on the Desktop case blinks every second or so. I sleep in the same room with the computer, and that blinking would obviously bother me so much when I want to sleep.

    So I am asking for a method, within Windows, that I could set to when I put the computer to Sleep, it would power down, yet the LED light would turn off completely. And please, the suggestion of physically covering the LED light with some clothes or tape, is not a solution. I want an option that I can set within Windows which disables the blinking LED light.

    Thank you so much!
      My Computer

  2. Posts : 42,519
    Win 10 Pro (22H2) (2nd PC is 22H2)

    Very unlikely to be possible unless you have a BIOS/UEFI option particular to your MBO.
    It also acts as a sort of warning to dissuade you from pulling the power plug, for example.

    This has been asked numerous times over the years - I assume you've done a general internet search already.
    windows 7 - How to stop power light on PC from blinking when in sleep mode? - Super User

    Just for light relief: (ha!)
    Disable Blinking Power Button while PC is asleep? - NZXT S340 elite - Power Supplies - Linus Tech Tips
      My Computers

  3. Posts : 4,162
    Windows 11 Pro, 22H2

    There is nothing that Windows can do about that. It's handled at the hardware level. Check you BIOS settings - some will allow you to change the LED behavior when sleeping.

    As for hibernating on an SSD, it's possible that you may be have become over sensitized to hype over wearing out an SSD. Checking the specs for your SSD to see what the TBW rating is and calculate what percentage life a year's worth of hibernations would cause you. It may be less than you expect.

    As an example, if you write the full 8GB to the hibernation file (highly unlikely) once every day. that's still under 3TB per year. Assume you have a TBW rating of 300TBW, that's one percent of the SSD lifespan per year.

    I use an SSD with a 1,600TBW rating and 32GB RAM so I don't even blink at hibernating
      My Computers

  4. Posts : 1,203
    11 Home

    On Win-Raid.com forum website you could ask around if it could be possible to mod the BIOS to gain that effect. Alternatively, you could decide to use the internal LPT (printer) port of your mobo to control up to 32 (thirty-two) LEDs and whatnot, see:
    Expansion to 32 Channels Parallel Port 74HCT573 LPT Relay - Electronics Projects Circuits
      My Computers

  5. Posts : 42,519
    Win 10 Pro (22H2) (2nd PC is 22H2)

    Or you could just put a notebook (paper sort!) or paper on top of it if facing up, or a book or other object against it, or arrange your furniture appropriately.

    Alternatively, if you want a real project, design some hardware actuated by Windows to cover it...
      My Computers

  6. Posts : 2,885
    Windows 10 Pro for the Bro
    Thread Starter

    dalchina: Yea, I did general research to figure out if it's possible to turn off the LED blinking while Sleeping, yet saw results with people physically altering their motherboard. I'm not going to take a risk to do that just for this little solution. But also, physically covering the LED / re-arranging furniture in the room, won't really work either. I saw one post where I can put the computer to sleep, and try unplugging the power (it apparently works with one person). Yet assuming that this works for my motherboard too, it would still be out of the picture, since I'd have to physically unplug the power cable from the wall. Too much of a hassle; I'm all about simplicity =)


    hsehestedt: Okay thanks for that info. I really appreciate you opening my eyes to the name and process of this.
    Yes, my drive should last a very long time according to that info. With a quick internet search of this main drive and TBW rating, it seems that this SSD (on which Windows is installed on) will last up to: 500 TBW (yay a big number!)
    (So assuming that I hibernate the computer every day (which I don't) and that it takes 8 GB (which you are right, probably not as much as 8 GB), then let's try to calculate this extreme scenario.)

    [Assuming that the hibernate file takes up 8 GB] AND [I hibernate the computer every day]:

    • 1024 (GB in a TB) divided by 8 GB = 128 days to consume 1 TBW. (or in other words: 8 GB a day for 128 days = 1 TB).
    • 128 days (aka 1 TBW) times 500 (to reach the max TBW) = 64,000 days (wow that's more than I expected before I started the calculation. Let's see how many years that is).
    • 64,000 days divided by 365 (days in a year) = about 175 years?

    ...that's a weird number for years. I did the calculation correctly, right?

    Well anyways, assuming that is true, then this drive should last for the rest of my life! Hahaha. The drive will probably cost like $2 when I'm in my 50s, if it would ever exist 2 decades later. Okay. But also, like you said, the computer most likely doesn't write that much space to the hibernate file, and I don't use Hibernate that frequently. Lately I've been using it much, but will probably be shutting down the computer, to turn it off, within the next week or so. Hence not a lot of space will be written on the drive, even when I'm using the computer doing intense work at certain moments, when downloading gigabytes of data at certain times. So the drive, technically, should last a long time.

    Thanks for helping me figure out a rough estimate of this drive's lifetime.


    hdmi: Thanks for the suggestion, but I'm not going to modify any hardware in the computer.


    Thanks for all the info, everyone. I seem to be leaning towards just using my same method of Hibernating the computer, whenever needed, and not worry about it, nor have an issue with startup times, in comparison to waking up the computer from Sleep.
      My Computer

  7. Posts : 99
    Windows 10 Home Version 22H2

    Just FYI, I have a tower desktop and have the power switch/led light covered with a small piece of paper folded about three times and taped to the tower. The folded paper covers ~90% of the led light output, yet is thin enough to allow me to press the switch if I want the computer off. Hardly noticeable at night. Simple & Lo-tech....
      My Computer

  8. Posts : 1,203
    11 Home

    retexan599 said:
    Just FYI, I have a tower desktop and have the power switch/led light covered with a small piece of paper folded about three times and taped to the tower. The folded paper covers ~90% of the led light output, yet is thin enough to allow me to press the switch if I want the computer off. Hardly noticeable at night. Simple & Lo-tech....
    I have an overly bright LED on my audiophile stereo equipment somewhere in front of my bed. It was shining almost straight into my eyes each time when I was trying to sleep. So, what I did was, I simply took a small piece of scotch tape and I painted a thick dot on it with a black sharpie, then covered this small piece of tape with yet another small piece of tape so that the ink doesn't rub off. Cut around the dot with a pair of scissors, carefully align it with the LED light while sticking it on there and voilą, problem solved.
      My Computers

  9. Posts : 2,885
    Windows 10 Pro for the Bro
    Thread Starter

    Thanks for the next replies.

    I'm not too sure about physically covering that light, since it doesn't look too professional on the desktop case. I'll keep it in mind though, if I figure out a small technique to make it look professional, or purchase a small device that flips from top to bottom or something.
      My Computer

  10. Posts : 4,162
    Windows 11 Pro, 22H2

    Another thought on this topic:

    I once had a device that had a very bright LED. It was in my bedroom so it was super annoying at night. I covered the LED with 2 layers of very dark vinyl windows tint. That got the LED down to a point where the status it was meant to indicate was still visible, but very dim.

    At least for me, that was a perfect solution in that instance.
      My Computers


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