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Blank screen on startup

By shane10
Oct 25, 2010
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  1. Hello All,

    As the title says I start up my computer and get blank screen. I have tested with 2 monitors so thats not the problem. I have changed the ram so that appears not to be the problem either. I have made a vid:

    youtube.com/watch?v=qLoA2I_x-Rc

    and heres a pic of my motherboard:

    b.imagehost.org/view/0428/DSCI0521

    Any suggestions would be welcome.
    The computer was shipped from poland to Ireland, something must have gone wrong on the way.
     
  2. AlbertLionheart

    AlbertLionheart TechSpot Chancellor Posts: 2,026

    that green cable with 4 connections is for a different sort of motherboard.
    when you start this there is no beep from the speaker - see if you can reconnect this and then tell us how many beeps you get when you turn it on, One beep is good - many beeps is not good but should give a clue as to what is missing.

    Is the voltage setting correct?
    I noted from the video that the power light and the HDD lights looked as if they were already on before you started the system - is this so?
     
  3. shane10

    shane10 TS Rookie Topic Starter

    Actually if you listen carefully you will hear 1 beep when I startup the comp.

    Those lights at the front I don't know what their for:

    b.imagehost.org/0903/DSCI0525.jpg

    Its not the hard drive though. The lights are always on even when the comp is not, unless I switch the psu switch off.

    Thank's for the reply
     
  4. shane10

    shane10 TS Rookie Topic Starter

    Right so I plugged in the 20 pin power supply connector to a tester the

    +3.3v
    -12v
    PG
    +5vsb
    +12v
    +5v

    lights all came on, the only one that didn't was the -5v, is that ok?

    I bought a new video card installed it in the pc and still I have the same problems. Can someone give me some suggestion as to what to do next or direct me to a forum that gets replies.
     
  5. AlbertLionheart

    AlbertLionheart TechSpot Chancellor Posts: 2,026

    do you have a manual for the motherboard - if you can find the right pair of jumper pins you could short out the BIOS for 10 secs and reboot to see it that sorts it out. I cannot hear the single beep but believe you!
    Also check the motherboard connections - I have seen this before when the wrong cable was connected across the reset button pins - this would also explain why the power light and HDD activity light are both on (on the front of the PC case) - best bet is to disconnect them all and start the PC with a screwdriver across the power button pins. If you have the manual it will help you find which pair of pins to use.
     
  6. shane10

    shane10 TS Rookie Topic Starter

    I changed the psu just in case it was that but no luck, same problem. I connected a different HDD from another computer but again same story. I don't have a manual for the motherboard. If it is the motherboard I think I will have to concede defeat on this one.
     
  7. AlbertLionheart

    AlbertLionheart TechSpot Chancellor Posts: 2,026

    As I suggested in my last post, check the mother board connections from the front panel of the PC case. Unplug the lot and restart with a screwdriver across the pins for the pwr connection - it will be marked on the board for you.
    Those lights on the front should not be illuminated unless the PC is running - they appeared to be lit before you powered it on in your video.
    Let us know what happens - it would be a shame to chuck the board if it was simply down to the wrong thing being connected!
     

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