Problem with DVI - DSub connections and no image

[Phil Stanbridge]

Got a weird one here, as usual!

For some reason my main system here (the red one) will not always display a picture when connected via DVI - but its 100% reliable using a D-Sub connector. I can get it working occasionally, like yesterday for instance, on two reboots it worked fine - but today (after cold booting) it will only work with the D-Sub. It's incredibly annoying. Anyone any ideas?

I'm using a Viewsonic VP201b 20" TFT and a GTX 7800.

Edit: I will try swapping the DVI cable over next.

 

[scorchio]

The resolution may be set out of the scan range of your LCD.Have you tried other drivers or re-installing them.

 

[maverik-sg1]

I actaully blew a DVI on my rig - so seems like a good place to start Phil - Scorchio has a point too - especially if using Rivatuner, sometimes I have to uninstall Riva (including removing registry entries) to update the drivers.

Also try a different monitor (dont think it will eb that though)?

Mav

 

[scorchio]

Other than that it may be a dodgy bios on the card or motherboard:O

 

[fatty]

I have never had a problem with my old trusty 17" tft its an eizo, but I remember we had that problem with other pc wouldnt hook up to the crt ??

Do you have a spare dvi cable??

Mav how did you blow a dvi up???

 

[M8tRiX]

Hook up a crappy monitor and set a slow resolution.

Then hook up the the viewsonic with DVI and take it from there.

 

[Phil Stanbridge]

I'm using the latest official dets by the way guys, and the refresh rate and all that monty is set accordingly @ 1600x1200 @ 60 which is perfectly fine for TFT's. I will try a different DVI cable first of all, at which point I may need to flash the firmware perhaps? I'm using an MSI GTX.

 

[scorchio]

Did you manage to solve your problem Phil

 

[Phil Stanbridge]

Nope!! It's very odd. I dont know if its a problem with the TFT or VGA. I tried a different cable. Generally after a cold boot the system will not show a signal - if I reset the system once it then does!

 

[maverik-sg1]

I get that too sometimes - probs twice a week is the GPU watercooled? could be a cold start issue or didgy mobo BIOS?

Mav

 

[Phil Stanbridge]

I get that too sometimes - probs twice a week is the GPU watercooled? could be a cold start issue or didgy mobo BIOS?

Mav

hmm there's a thought! Is it watercooled yes. The bios on the motherboard is the latest official 1009 so nothing dodgy about that.

My card is running at about 35 idle.

 

[maverik-sg1]

35 is usually the golden number - is it colder than that from a cold boot though?

Mav

 

[Phil Stanbridge]

35 is usually the golden number - is it colder than that from a cold boot though?

Mav

Yep! Probably around 31 degrees. Maybe thats it - is there a solution?

 

[maverik-sg1]

well there is, flash the BIOS on your cards or swith off rad fans until unit fires up.

Get a warmer room

Mav

 

[boardy]

LOL i love that, get a warmer room comment mav. Just for future reference, how can flashing the BIOS help unless its a modded BIOS? I've never really played with nVidia cards, only ATI's so things are obviously different.

Boardy

 

[nick25]

I think he meant flash it to a modded bios - one with higher voltage, or one with a lower temp threshold.

Crazy to think we need things hotter though...

 

[Phil Stanbridge]

well if you guys have a walk and the modified bios I'm all ears..

 

[boardy]

Phil mav can mod the BIOS for you i believe. He's modded his ones so think he's the best one to talk to about that. I believe he's also increased the standard core speed on his GTX's.

Just outa interest is this your own personal PC? Thought you were running a lappy but may be behind times again lol.

 

[maverik-sg1]

Gtx Bios To Use

Hi Phil,

If its the 256GTX use the BIOS attched in this thread http://www.extremeprometeia.com/forum/showthread.php?t=3758

Should help.

Mav