Monitor goes to sleep mode/CPU stops working properly

I shut down my computer a couple days ago and when I restarted, it got to the desktop (Windows Vista) but suddenly the monitor went to its standby mode. Now sometimes I'll reset it only to have it happen right away. Last night I had the computer running OK until a little bit ago when we went out, and it happened again.

I've noticed that when this happens, the CPU itself is really making a roaring sound like it's working hard. If there was any audio coming through on the speakers or headphones, it'll get stuck looping until I shut the system down. I bought the PC about two and a half years ago. I'm wondering if maybe the power supply needs replacing but I'm not too experienced with PC hardware. I opened it up yesterday and dusted it out pretty well. It's a Gateway DX4300-03:

AMD Phenom X4 9750 Quad-core
ATI Radeon HD 4650 1024MB
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More about monitor sleep mode stops working properly
  1. Hi :)

    Firstly its nothing to do with your monitor... its NOT going to sleep, its the PC stopping providing a signal to it....

    The roaring noise sounds like a fan overworking to me....get some temperature testing software and come back here with your temps...

    All the best Brett :)
  2. Thanks, Brett. Where might I get something like that?

    that should check your cpu temperatures.
  4. Here's some of what I was able to see with that program:

    Fan1: 20 RPM
    Fan2: 5136 RPM
    Fan3: 0 RPM

    Then another group of fans:

    Fan1: 1581 RPM
    Fan2: 885 RPM
    Fans 3 through 5 in this group are at 0 RPM as well as the GPU Fan.

    And the temperature readings:

    Temp1: 44C
    Temp2: 44C
    Temp3: 56C (and a little flame picture)
    HD0: 38C
    Temp1: 44C
    GPU: 65C
    Core: 31C

    At this point in typing the message, my CPU usage is at about 2.5% and making virtually no noise at all. I had put the system on sleep mode earlier and it was like that for about 8 hours total.
  5. ok now try running some that stresses the cpu
  6. I'm actually making this post from another computer as I've been unable to get my own working now. It will not have anything show up on the monitor at all and I just end up needing to shut off the CPU.

    I ran a game and I noticed that the very first temperature reading went up just from the main menu of the game. It was about 56C or so when I alt-tabbed out to check and had the flame symbol. I tried to start a game on there and it went through the loading process and played the level a bit before it stopped working. I shut it down and unplugged it for the night and tried again in the morning but couldn't get it up and running.
  7. It may also be worth noting that a few of the times I've tried to turn it on yesterday, the CPU would make one long beep followed by two short beeps and repeat that until I shut it down.
  8. I suggest reseting the motherboard by removing the battery and then putting it back.

    then try again. you might have fried something. But your temps looks pretty normal. I think its your power supply unit.
  9. Given that I'm not entirely tech-savvy, how would I go about doing that with the motherboard?

    I was kind of leaning toward a power supply issue, and I was actually going to go by Best Buy tomorrow to see about getting one.
  10. there should be flat circular battery on the motherboard which you can remote and put back to erase any setting you set into the bios.
  11. I tried doing the new power supply on the computer put no change there.

    I was also able to do the battery on the motherboard and not really much there either. Just for the sake of trying, I took the monitor plug out of the graphics card and put it into the other monitor port on the computer. There was a kind of bootup screen and I selected to load the previous settings (looks like maybe I shouldn't have chosen that option). There was a Windows loading screen for a bit then came up the blue screen of death. I did see something on there referring to ataport.sys which leads me to believe I didn't connect something right when I put it back together, but I can't imagine what that might be.
  12. Bit of an update: I tried plugging in my computer yesterday and it started running like normal. It got to the desktop but it only showed my wallpaper, no pointer or start bar or anything. I unplugged one of the cables from the monitor to the computer and that set it back to normal. I left it like that and was able to move some important files to a flash drive and then experiment with it a bit. I tried running a very mild game (Dwarf Fortress which is not graphics intensive at all) and that ran fine. A while after that, I started up the Sims 2 but the resolution was off. I had it in one of my neighborhoods and was trying out the different resolutions when it stopped working. However, the music in the background was still playing fine until I tried doing alt-tab out of it then go back to it and it was still playing normally.

    So, at this point, I'm starting to wonder if it might actually be my graphics card going bad. I'm going to download updated drivers from this computer and do what I can to install them on my own. However, if this doesn't work, I may end up buying a new graphics card. Do you think a bad graphics card may be the problem?
  13. Im guessing your gpu died.
  14. I actually did the drivers update and so far it's been running fine. Had it on for about a full day now. It's actually running better than before the issue was happening. Hardly makes much noise anymore. Just for the sake of checking, I ran SpeedFan earlier and I saw that everything was OK, just the GPU was up around 59-60C (while running a game). Would this be an issue or is it fairly normal?
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