TechSpot

No Display Input?

By ceus73
Aug 30, 2008
  1. I recently built my PC and all was working fine, i installed a few drivers that came with the hardware, restarted the computer and when it came back on there was a message on the screen that said 'No Display Input'

    I have taken it all apart and put it all back together again a few times and nothing has happened.

    I then sent the motherboard back to where i purchased it and they tested it and found nothing wrong, sent it back.

    Can anyone help? It could be to do with the motherboards intergrated graphics chip because i also have a graphics card insatlled.

    PC SPECS

    Gigabyte GA-MA78GM-S2H Motherboard
    ATI 4850 HD
    4GB Ram
    AMD Phenom 2.3ghz x3 processor


    Please help :(
     
  2. insoman

    insoman TS Booster Posts: 102

    if the MOBO came back tested and all clear then you should discount it. Try taking the card out and using the on-board graphics. If that works it should narrow down the cause.
     
  3. ceus73

    ceus73 TS Rookie Topic Starter

    I've tried that, still no display input
     
  4. kimsland

    kimsland Ex-TechSpotter Posts: 14,524

    Remove any addon PCI Cards (including your Vid card again)
    Whilst you're at it, confirm all internal connections are secure

    Unplug everything from the back (including everything! ie keyboard, Mouse, power, you name it)
    Hold the ON button in for 30 secs dispersing all internal voltage

    Plug in the Video cable and the Power cable only
    Turn on

    Still the same? This time unplug the internal HardDrive and DVD Drive (motherboard data end)
    Try again

    Still the same?
    You will need to benchtest your Motherboard. But I think (at a guess) it's either internal connections (ie the 4pin power plug not connected or something) or it's likely faulty: Power Supply
     
  5. CCT

    CCT TS Evangelist Posts: 2,653   +6

    Should use only 1 stick of the ram for benchtest - alternate between all 4 to 'prove' them.

    That graphics card requires '450 Watt or greater power supply with 75 Watt 6-pin PCI ExpressĀ® power connector recommended'.
     
  6. ceus73

    ceus73 TS Rookie Topic Starter

    Thanks guys illtry everything you've suggested and tell you how it goes

    Im also gonna test all the components individually in another PC, the power supply is 750w so i dont think theres a problem there
     
  7. ceus73

    ceus73 TS Rookie Topic Starter

    i tried everything and still the screen stays black with the orange light on
     
  8. CCT

    CCT TS Evangelist Posts: 2,653   +6

    The Gigabyte site doesn't mention a 6 pin PCI-E auxilliary power connector on the specs. It does have one does it?
     
  9. ceus73

    ceus73 TS Rookie Topic Starter

    nope

    it has a 20 pin and a 4 pin on the motherboard, the graphics card has a 6 pin connector socket on it
     
  10. CCT

    CCT TS Evangelist Posts: 2,653   +6

    So, mobo checks out ( so they say).

    Card works in another comp.

    Onboard doesn't work either.


    Culprit is Mr. Green in the Kitchen with a suspect monitor or monitor cable.


    Maybe.
     
  11. ceus73

    ceus73 TS Rookie Topic Starter

    i have tested the monitor and cable also :S
     
  12. CCT

    CCT TS Evangelist Posts: 2,653   +6

    Then, mobo or Bios setup you have.
     
  13. ceus73

    ceus73 TS Rookie Topic Starter

    i tried overclocking the processor shortly before the pc stopped working which could be the problem, could have burned out. I've already reset the cmos values and taken and replaced the motherboards battery, no luck there though.
     
  14. CCT

    CCT TS Evangelist Posts: 2,653   +6

    "I recently built my PC and all was working fine, i installed a few drivers that came with the hardware, restarted the computer and when it came back on there was a message on the screen that said 'No Display Input'"

    "i tried overclocking the processor shortly before the pc stopped working which could be the problem, could have burned out. I've already reset the cmos values and taken and replaced the motherboards battery, no luck there though"

    You are a Bad Bad Person! LoL

    What concerns me the most is that onboard graphics don't work.

    Have you tested the monitor AND cable(s) on another comp?

    If so, your PSU is now suspect.

    (this is FUN isn't it?)






    Because, if it is OK and all else is then God Hates You!

    I am in a mood tonight!

    BUT, you do have a serious dilemna.
     
  15. ceus73

    ceus73 TS Rookie Topic Starter

    Fixed

    Thanks for all the input guys, the problem is now fixed.

    i was taking the processor out to send it back when i noticed bent pins, got a pair of tweezers and straightened them out :p

    Put it back in and it worked :D
     
  16. kimsland

    kimsland Ex-TechSpotter Posts: 14,524

    Thanks for the update :grinthumb
    The 4th post here, on Benchtesting it, would have discovered that too
     
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