HD6670 No signal input

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thrombox

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Mar 24, 2014
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Spec:
Dell Optiplex 755 SFF
A22 Bios
Intel E8600 3.33Ghz CPU
Chipset Intel Q35
2Gb Ram
320Gb HD
1GB HD6770 Radeon
Windows XP 32 Bit Home.

Succesfully installed a new HD 6770 Sapphire low profile card, it works very well in heavy gaming etc.

My probem is almost identical to the one on this thread:


[url=http://www.tomshardware.co.uk/forum/340229-33-input-signal-hd6670-card-problem]http://www.tomshardware.co.uk/forum/340229-33-input-signal-hd6670-card-problem
[/url]

Initially I was having problems with the screen going black and "no signal input" coming up, this was random and could happen in 15 seconds or after 30 minutes.

Anyway went to the BIOS and changed the graphics controller but I only have two options "Auto" (use the add-in card) and "Onboard/Card" (the onboard/card one says it will use the PCI-e slot to override the IGP should one be present". I switched it back to "Auto" as it was on "Onboard/Card".

So anyway now the problem seems to be mostly cured, but this time if I leave the computer alone for longer periods without use I again get the "no signal input" no amount of reconnecting helps it and I have to restart. It seems the IGP is not totally disabled and it seems to occur when the computer idles.

I tried this solution from bloc97. But can only get to step 2. Ideally if bloc97 could give me a hand would be great, he seems to be right on top of this problem!

That seems more of a windows-side problem, did you disable the intergrated IGP in the BIOS? Sometimes windows defaults the output to the Motherboard and does not use your card.

If you cannot disable your Intergrated GPU, follow these steps.
1- Boot your computer with your current card inserted, then plug your monitor to the motherboard.
2- If it doesn't show anything (don't continue), it may mean a other issue besides the graphic card.
--- Continue only if you can access windows.
3- If you have a second monitor, plug that one temporary on the Inserted Graphic card.
4- Right click on your desktop, choose "Screen Resolution" if you have Win7, or "Properties" if you have WinXP.
5- Choose the Monitor #2 as the main monitor and disable the Monitor #1.
6- Un-Plug both of your monitors and plug in your main monitor (The one that you want to use) on the Inserted Graphic Card.

If one of the steps that I mentionned above doesn't work, please post more details.

Also, did you try to revert back to your old Graphic card? does it still work?

Hope it helps! :)
Click to expand...
 
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thrombox

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Mar 24, 2014
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I have done a fresh install of the system and I don't believe I installed any IGP drivers. Wouldn't know how to find them anyhow.

In the BIOS there is only the "Auto" and "Onboard/Card" options.

Btw disable power savings like stand-by/close monitor
Click to expand...

Standby is off, but disable monitor is at 20 mins. I believe this is one of the occasions when the problem occurs. Still would like to sort it out without having the monitor turning off disabled.

bloc97 knew exactly what was going on on that other thread. Its something on the windows/system end.
 
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emdea22

emdea22

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Init display first' is not the same as enable/disable onboard video. For example it has no "auto" option... that should solve your issue you just have to find it as it might be called something else. Check mobo manual if you can't find it. I have it on both MSI and Gigabyte motherboards

Also disable IGP from Control panel ->device manager -> display adapters - right click disable
 
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thrombox

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Mar 24, 2014
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There is no such feature on my BIOS also there is no IGP in device manager display adapters.

I know you are trying to help but you are not, really you are not grasping at the problem which bloc97 clearly recognised, it is a Windows side problem when coupled with this graphics card.

Unfortunately bloc97 did not give the solution if step 2 of his process did not work. Hopefully he is active on this forums.
 
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thrombox

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Ok still no solution, turning off standby means I do not get a no signal input screen during idling.

It still happens the first time I turn the computer on after a prolonged period of it being off and occasionally when shutting down, when for some reason it hangs..
 
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thrombox

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Mar 24, 2014
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Can no one really help me?

I've now deduced this is 100% a Windows/Software issue, but I still have no idea how I can stop it.

Here's what I've done/what happens.

-If I set x minutes to turn the screen off in power options, once the screen turns off I then get the "no signal input", although I still get skype calls etc. So I've set turn screen off to 'never'.

-I reinstalled Windows XP and the drivers, same problem.

-Trying to use the IGP while the graphics card is installed produces a black screen with no signal input, obviously the IGP is disabled by the software.

-Removed the graphics card and loaded up with the IGP, checked device manager there are no hidden drivers etc. that I can uninstall.

-When I have switched the computer off for a while and turn it on for the first time I am guaranteed a "no signal input" black screen when windows has just loaded.

I thought this was card related but when I removed the graphics card and used the IGP, I also get this black screen for a second or two when Windows has just loaded. Clearly the monitor powers off for a second or two, in the case when using the HD6670 it results in getting the 'no signal input' screen.

Oddly this only occurs the first time I load up the computer after a period of use.

-Occasionally when turning off the computer I get this 'no signal input' screen and the computer doesn't turn off, haven't been able to ascertain the cause of this.

It is clear to me it must be due to the fact there is no permanent way to disable the IGP in the BIOS so whenever the monitor turns off for even a moment, the system switches over to the IGP, thus giving me the 'no signal input' screen.

P.S. I am able to play games on max settings for 8 hours straight, stable with no problems whatsoever.
 
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emdea22

emdea22

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Well you could always switch to windows 7 and have the problem go away. I do love XP but its kinda showing its age and M$ isn't really helping things. Also this is a common occurrence on my LG 24EA53 when connected to two or 3 computers at the same time and one enters stand by. In my case its the monitor, i have to turn it off then back on again. Btw did you try to update the bios? i've had "init display first" in pc's from athlon XP era.
 
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thrombox

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Mar 24, 2014
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I can't replicate it because I can only get to step 2. There is no explanation what to do if this is the case.

This is what happens when I try and connect the 2nd monitor. I'm thinking it could be a power issue.

http://i747.photobucket.com/albums/xx115/accjnt/Graphics%20issue/IMG_4204_zps555409d5.jpg
 
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