Video Card Not Detected!!!!

Custom / CUSTOM
March 11, 2011 at 06:57:47
Specs: Windows 7, 2.1 GHz / 1919 MB
I have an XFX 8400GS 512MB dedicated graphics.My motherboard is ASUS M2N68-AM.There have been absolutely no problems till about 2 months ago,when suddenly the display stood still.I was enjoying some music and the pc was kept idle for abt 15mins or so.Only the display hanged up.The music was still playing.I reset my pc,but den after it showed No Signal on my monitor.But boots into the OS(WINDOWS 7 Ultimate-32 bit).I switched to onboard VGA and it works fine.I tried all the things i could.But nothing fixed.It had no problems since i had assembled it back in 2009.I tried uninstalling drivers,the card itself,reinstalled it,but no use.
Then just a few days back i came across one of the topics from this forums itself,which was similar to my issue.They had suggested a psu swap.I have 250W psu(i-ball),it came with the cabinet itself.Its a double rail one,giving a current of max 17A at +12V.I found no ways to disable the onboard graphics on bios as well.

Please somebody help me with this prob.At least let me know what the problem's with,whether the MOBO,GPU or PSU.....Please help.Thanx in advance.....


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#1
March 11, 2011 at 07:10:45
The 8400GS is a low end, low power card. I highly doubt the power supply is the problem, however, iball PSUs suck so it probably wouldn't hurt to upgrade. More than likely, your video card has failed. Can you test it in another system?

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#2
March 11, 2011 at 07:23:13
No..I have tested it in other system.It worked fine....

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#3
March 11, 2011 at 09:02:51
"There have been absolutely no problems till about 2 months ago,..."

What happened 2 months ago at about that time ?

Was there a power failure event that might have produced power spikes or power surges?
A nearby lightning strike ?

Had you been fiddling with the video card inside the case ?

Had you been fiddling with anything inside the case ?

Did you clean the inside of the case at about that time ?
If so, did you use a vacuum cleaner ?

Were there any static electricity discharges to the computer ?

Did you change settings in the bios BEFORE that happened ?
...............

Did you REMOVE the AC power to the case at ALL times when you were fiddling with the video card or any connection inside the case ?
.......

Apparently there is a
M2N68-AM
M2N68-AM PLUS
M2N68-AM SE
M2N68-AM SE2

Assuming you have a plain M2N68-AM model, there are 4 English manuals listed for it,
Version E4417
Version E4374
Version E4210
Version E4113

so there are probably as many as 4 versions of the mboard.

Which Exxxx version is shown in the beginning of the manual for your mboard ?

I downloaded and looked in one of those manuals.

In the Bios Setup

Advanced

Chipset

Southbridge Configuration

Primary Graphics Adapter

Default: PCI-E > PCI > IGP

or IGP > PCI > PCI-E

IGP = Integrated Graphics Processor = the onboard video

There is NO SETTING in the bios that can disable the onboard video.
Installing a PCI-E X16 card in the PCI-E X16 slot auto disables the onboard video, if the card is detected properly.

Installing a PCI video card probably does NOT auto disable the onboard video.

All the Primary Graphics Adapter setting does is inform the operating system which type of graphics adapter you're using.
If that's set wrong, you still have video in Windows 2000 and up, but when the setting is wrong the advanced features of the card that the specific video drivers allow for won't work properly in Windows .

Since the graphics card works fine on other computers....

- the card may have had a poor connection in it's slot.
Did you check it to make sure it was all the way down in it's slot ?
Did you try removing the card from it's slot and re-installing it ?

- the bios settings may be otherwise wrong for the card.
Apparently you can overclock the PCI-E bus setting in the bios in the Advanced settings. If you're doing that, don't do that, or back off on that. Bios defaults do not overclock that. Video cards often don't work when their bus speed is overclocked more than a tiny bit.

- the circuits of the slot you had the card plugged into may have been damaged, by an external event that wasn't your fault, or by something you did. In that case, no video card will work properly in that slot.
...........

Some mboards develop this problem - electrolytic capacitors were installed on them that were not properly made, and they fail eventually - the mboard manufacturer didn't know they were improperly made at the time the mboard was made.

Open up your case and examine the mboard to see if you have bad capacitors, and/or other findable signs of mboard damage .

This was the original bad capacitor problem - has some example pictures.
History of why the exploding capacitors and which mboard makers were affected:
http://members.datafast.net.au/~dft...

What to look for, mboard symptoms, example pictures:
http://www.badcaps.net/pages.php?vid=5
Home page that site
- what the problem is caused by
- he says there are STILL bad capacitors on more recent mboards.
http://www.badcaps.net/

Pictures of blown capacitors, other components, power supplies, fried Athlon cpus, etc.:
http://www.halfdone.com/Personal/Jo...


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#4
March 11, 2011 at 20:03:15
-There was no reason for this.Suddenly stopped hanged up the display only....music was still going on.Just somedays before i unplugged the ram n cleaned it then plugged it back in.No other activities were done.

-My MOBO is M2n68-AM Version E4210.

-I've checked the bios settings.Its like this PCI-E > PCI > IGP by default.

-I removed the card from the slot n reinstalled it.No way.I really doubt the slot is causing these problems.

-As in the case of overclocking it is set to auto.What should i do with it?should i change it to manual or leave it as it is?

-I found No bad caps on the MOBO or any other damage signs on it.

-----Now i've inserted the Graphics(8400GS) and now its taking a lot of time to show up the display.As if like a confusion to select which adapter to select.But still selects the onboard one.The is not detected in Device Manager.No unknown devices or anything.As both graphics are nvidia ones when i install the latest driver it automatically gets assigned to the onboard one itself.......What should i do?Is there any way?


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#5
March 11, 2011 at 21:00:59
"Now i've inserted the Graphics(8400GS) and now its taking a lot of time to show up the display.As if like a confusion to select which adapter to select.But still selects the onboard one."

The slot circuits or the mboard otherwise are / is definitely fried.

"As both graphics are nvidia ones when i install the latest driver it automatically gets assigned to the onboard one itself..."

The software on the hard drive has nothing to do with the bios / mboard detecting the card properly.

You could try a PCI video card.

Installing a PCI video card probably does NOT auto disable the onboard video.


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