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Monitor has issues with detecting input?

By kmatthews24
Sep 2, 2010
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  1. Hi, i own a BenQ T903 19" LCD monitor and lately its been acting up. Basically a blue screen continuosly appears and disappears on the monitor saying:

    "input select" then gives me two options D-sub and DVI

    but i dont have to press anything and it will just keep flickering on my monitor, its absolutely annoying. The only fix i can think of was to check my connection, and its fine. Any ideas?
     
  2. captaincranky

    captaincranky TechSpot Addict Posts: 10,834   +925

    That sounds like it's searching for a signal. You need to hook the monitor to another computer first, to rule out problems with the video in your desktop.
     
  3. mailpup

    mailpup TS Special Forces Posts: 8,462   +229

    How did you check your connection? If you haven't already, try another cable.
     
  4. kmatthews24

    kmatthews24 TS Rookie Topic Starter Posts: 34

    went out and bought a new cable, works flawlessly.

    thanks pup
     
  5. techsuitor

    techsuitor TS Rookie Posts: 145

    So, it's all set? :)
     
  6. kmatthews24

    kmatthews24 TS Rookie Topic Starter Posts: 34

    yes sir. annoying problem to have but an easy fix!
     
  7. techsuitor

    techsuitor TS Rookie Posts: 145

    haha.. It's normal.. :)) the best way is to analyze the problem well ..
     
  8. mailpup

    mailpup TS Special Forces Posts: 8,462   +229

    Good. An easy fix. Too bad they aren't all so easy. :)
     
  9. techsuitor

    techsuitor TS Rookie Posts: 145

    yeah!. .. :)) thanks for the help of everyone
     
  10. kmatthews24

    kmatthews24 TS Rookie Topic Starter Posts: 34

    lasted a few days with a new cable but the problem came back any ideas?
     
  11. kmatthews24

    kmatthews24 TS Rookie Topic Starter Posts: 34

    can anyone help with this problem?
     
     
  12. Tmagic650

    Tmagic650 TS Ambassador Posts: 20,944   +167

    Have you tried another monitor to rule out the suspect monitors problem. It may be the video card or on-board video causing this
     
  13. kmatthews24

    kmatthews24 TS Rookie Topic Starter Posts: 34

    ok i hooked up my computer to my tv for a few days and no blue input message what does this mean?
     
  14. Tmagic650

    Tmagic650 TS Ambassador Posts: 20,944   +167

    Back to the computer... maybe a loose connection to the DVI or D-Sub connectors in the video card
     
  15. kmatthews24

    kmatthews24 TS Rookie Topic Starter Posts: 34

    so your saying open up the computer and check connections?
     
  16. Tmagic650

    Tmagic650 TS Ambassador Posts: 20,944   +167

    Yes, sometimes there is a small ribbon cable connected to the video card that may be loose. If not, you may have to replace the card if it is an add-on card and not on-board video. If it is on-board video, you may have to buy an add-on video card... Confused?
     
  17. kmatthews24

    kmatthews24 TS Rookie Topic Starter Posts: 34

    how will i know if its on-board or addon?
     
  18. mailpup

    mailpup TS Special Forces Posts: 8,462   +229

    If it is a separate card, perhaps it is loose in its slot so that when you removed the old cable and attached the new one, it wiggled the slot connection enough to temporarily establish a stable connection. But now it's loose again.

    Try running the freeware CPU-Z. It has a graphics tab that should say what your graphics card is.
     
  19. Tmagic650

    Tmagic650 TS Ambassador Posts: 20,944   +167

    "Addon" is a separate card from the motherboard, that can be removed. "On-board" is that the video connectors are part of the motherboard and cannot be removed
     


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