New build not recognising tft screen

By steve67474 ยท 8 replies
Mar 25, 2006
  1. Hi Guys new here so hope u can help me. I have built lots of PCs over the years and a m8 asked me to build him a gamer, so put together Asus A8N32 mobo with sli and pci express. Athlon 3700+, 2 gig DDR400 memory and geforce 6800gs PCi express card. Built it no prob and used a crt monitor to load system up. M8 has a 17" tft at home so only built the base system for him. All fine until he got it home and connected his TFT screen. It doesn't even bring the bios screen up? no beeps or nothing. It does not bring the tft online??? used dvi and vga connections and same thing occurs. put CRT back on system and bingo up it comes??? antbody any ideas? it seems to have remembered that a crt was on it on initial build and wont let go so to speak.

    Thanks in anticipation.

    PS all drivers are fine and when booting up with crt everything is fine. this is a basic "cant see the TFT problem at initial bootup". Have tried different TFT and still same problem?? Cheers guys am at a loss
  2. Ididmyc600

    Ididmyc600 TechSpot Chancellor Posts: 1,415

    And His TFT is tested as working on another PC I take it???

    I mean BIOS boot doesnt care whether it's a CRT TFT or LCD it just uses a basic output chip to give the image on the screen

    If you can't get a BIOS screen then check the monitor cabling and PSU and test it on another machine ,or a laptop if you have one.

  3. mailpup

    mailpup TS Special Forces Posts: 7,186   +469

    Some cabling might have come loose while transporting the new PC. Check all connections.
  4. Tedster

    Tedster Techspot old timer..... Posts: 6,002   +15

    is the output digital or analog on his system? That can make all the difference.
  5. steve67474

    steve67474 TS Rookie Topic Starter

    thanks for the replies guys, all cabling has been tested and tft works on another system. the graphics card outputs analog ok due to a CRT working on it. Strange one eh! am now wondering if anything in bios needs changing, but thought default settings would pick up a tft. Mind you this is the first PCI express system I have put together
  6. Spike

    Spike TS Evangelist Posts: 2,168

    If the mainboard has orboard graphics, try that - for troubleshooting purposes.
  7. DonNagual

    DonNagual TechSpot Ambassador Posts: 2,406

    Sounds to me like the drivers are messed up. I'd check for an update to the motherboard's chipset drivers, then re-install the video card drivers and see if that doesn't fix you up.
  8. steve67474

    steve67474 TS Rookie Topic Starter


    Hi Guys went round there today to have a look myself and sure enough it would bring a CRT up but not TFT. I reseated the graphics card and bingo all ok! Strange error tho. Screen now connect via dvi and vga to TFT monitor. Thanx for all your input guys gr8 to know help is close at hand.
  9. CrossFire851

    CrossFire851 TS Rookie Posts: 766

    You could have lowered the resolution to pore quality. Then resteated it to high quality.

    Since it works great!!!
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