Computer runs fine but power light continously blinks

I recently noticed that the blue power LED light on my case blinks about every 2 seconds while the computer is on and seemingly running just fine. I'm not sure exactly how long it has been since this started, but I'm guessing a week or two at most. I have powered off and rebooted recently, but the problem remains.

I am running Windows 7 64-bit with a Gigabyte GA-P55M-UD2 motherboard, Intel i5-750 CPU and a Corsair CMPSU-400CX PSU in a Cooler Master Centurion RC-534-SKN2-GP case. I leave the computer on 24x7 witth Sleep kicking in after 2 hrs of inactivity.

Right now this is just an annoying quirk and I've not noticed any other issues. I have read some other posts mentioning this behavior could indicate a PSU problem, but cannot confirm.

Any suggestions on diagnosing and correcting this issue would be appreciated.

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  1. The_Bman said:
    I recently noticed that the blue power LED light on my case blinks about every 2 seconds

    What's the status of the hard drive led ?
  2. Pretty steadily blinking, but much more randomly or intermittently than the power LED. The power LED is blinking like clockwork, roughly every 2 seconds.

    I would have said the hard drive LED is working perfectly fine. However, I never paid that much attention to it (since it's alot less noticeable) to know for sure if it's recent behavior is different than normal.
  3. Any system crashes ?
    Have you check the connection to make sure it's tight ?
  4. No system crashes recently. However, since I built this computer last October, it will periodically bluescreen or freeze a few minutes after I wake it up from Sleep mode. This happens a few times a month. The bluescreen message and other diagnostics have been very generic and I gave up trying to pinpoint the source. It only happens intermittently after coming out of sleep so it has only been a nuisance not a serious issue in my mind. The computer always reboots fine back in Windows like nothing happened. That issue has not occurred in the last 10 days.

    I did just shut down and check the power cable. Felt secure. I unplugged and reseated it anyway, then rebooted. The blinking remains.
  5. Maybe try switching the HD and power leds and see if it's a problem with the led itself.
  6. Bman I have the same mb P55M-UD2 , the blinking is to show that DES2 / EnergySaver is working.
  7. Ah, RTFM.
  8. jsc said:
    Ah, RTFM.

    what can I do for this problem?????????
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