Why is my CRT monitor blinking?

Discussion in 'Computer Help' started by McQualude, Sep 3, 2004.

  1. McQualude

    McQualude Member

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    Recently my monitor started blinking, the screen goes black for about 1 second sporadically. It happens in Windows and I booted the Ultimate Startup Disk and it blinked then also, so it must be hardware.

    Dell Dimension 4550 w/ M782 17" CRT monitor, about 2.5+ years old
    512MB RAM
    5900XT 128MB
    8X NEC 2500 DVD burner recent upgrade from original DVD drive
    32X cd burner
    firewire card
    onboard sound & LAN

    My old Viewsonic monitor developed the same problem after it was about 1 year old (different system).

    Is the monitor going bad?
     
  2. LiLithTecH

    LiLithTecH Diamond Member

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    When the problem occurs, do you hear a loud snap before the
    screen goes blank?
     
  3. McQualude

    McQualude Member

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    No. There is no sound associated with it at all.

    My Viewsonic had this problem for quite a while and never got worse, but it is annoying, especially when gaming.

    My monitor started 'blinking' after a hard drive change. The old drive went bad, the new drive was coincidently bad and the monitor started blinking around that time. I upgraded the video card after the blinking started, but it had no effect. I now have a 3rd hard drive going bad, 2 years old, same brand/model as the first drive that went bad.

    A person on a newsgroup with the same problem, noticed the the blinking frequently occurs in tandem with right clicking large files, I had noticed this also and although I can't imagine a connection, it doesn't seem to be coincidence.

    I just tested... I right clicked 15 multimedia (MPG,WMV,AVI) files from 2-175MB, the monitor blinked in conjunction with my right click, 15 out 15 times. It did not blink when I right clicked on JPEG files. I repeated the test, again it blinked 15 out of 15 times, BUT, the third time I tested, it did not blink, so I switched folders and it did not blink.

    I'm stumped.

    Ideas... I'm wondering if all these events, the hard drive failures, the blinking and the occasional slowdowns are all symptomatic of a single cause, possibly an insufficient or failing power supply, variations in the house line voltage or a failing motherboard. I Know the original 250W PS is marginal, especially since I added the 5900XT, but the problems started before the card upgrade.
     
  4. McQualude

    McQualude Member

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    I definitely have an underpowered PS, I got an error message telling me so, but I don't know if that would cause the blinking.

    Anyone? Questions? Comments? Smart Remarks?
     
  5. MedicBob

    MedicBob Diamond Member

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    IT might be a video card problem. Reseat the card, ensure the cable is plugged in and secure. A bigger PS might fix it, but I am not sure.
     
  6. McQualude

    McQualude Member

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    I switched cards to no effect.

    Someone suggested that the monitor is going bad, but I have never seen a monitor fail that way.
     
  7. LiLithTecH

    LiLithTecH Diamond Member

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    Have you ever checked the outlets that you have your
    devices plugged into?

    If you are having problems with Drives and Monitors failing,
    there is a good possiblity they are getting to much power
    (more than a 120v\surge).
     
  8. tm37

    tm37 Lifer

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    When It shuts down does the Power light turn off or go yellow?
     
  9. McQualude

    McQualude Member

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    It would probably be worthwhile to install a UPS to prevent surges/brownouts. I'm sure the computer is more sensitive to that.

    I don't know about the power light, I'll check next time I shut down.
     
  10. tm37

    tm37 Lifer

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    When the computer monitor flashes off the pight will either be off or yellow.

    Off would lead me to beleive that you monitor is faulty.
    yellow would lead me to believe you have a Video or PS issue.
     
  11. McQualude

    McQualude Member

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    The light stays green when it blinks.
     
  12. CeilingHoles

    CeilingHoles Member

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    It might be possessed!!:Q

    Seriously, try a different power supply if you have one lying around..
     
  13. McQualude

    McQualude Member

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    I ordered an Antec True380 yesterday. I'm also going to buy a Belkin Home Office UPS.

    A few minutes ago I had a scare, I thought the monitor was a gonner... it blinked and stayed black for 2-3 seconds.
     
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