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Gigabyte GA-MA780G-UD3H - VGA problem

VegaX

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#1
Hi to all, i'm new of the forum :)

I have a VGA video problem with my motherboard Gigabyte GA-MA780G-UD3H (rev .1.0). I have intalled Windows XP SP2 and Ubuntu Linux in live whith no hard disk connected.
Sometimes during startup windows vibrates and at the start UP of the system there is a green refreshing line 1 cm high on the top as visible down:



PC configuration:
- Gigabyte GA-MA780G-UD3H(rev .1.0)
- CPU AMD 720
- Memory Brand : Corsair DDRII 800 2x2Gb
- Power Supply : 500 W

I have recorded the problem whit a digital camera and I have put the video on youtube, look at VGA problem

I have tested the system with other four LCD but sometimes the problem comes out.

I have change two motherboard and the problem persists !
What i can do? :banghead:

thanks to all
 

peterzui

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#2
Hi VegaX,

I am probably having the same problem with this mobo.
An unstable videosignal out of the onboard DVI output.
Did you get any new information or even a solution ?

Any help is appreciated.
 

peterzui

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#4
graphic drivers

All drivers instaled are the newest ones.
However, instability persists.

Plan to try the plasmascreen on the HDMI to
exclude bad DVI or/and monitorbehaviour.
 

peterzui

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#5
further tests

Connected Pioneer plasma tv screen via HDMI-HDMI cable to the motherboard, picture was stable with all modi. !!
Tried another monitor LCD screen via DVI---> unstable with all modi
Tried monitor LCD screen with D-sub-D-sub cable ---> stable with all modi
Tried monitor LCD screen with another DVI-DVI cable ---> stable with all modi.

After this, I thought the DVIcable might be the weak link; however videoscreen became instable again.
At this moment I am using the D-sub-D-sub connection and it is stable.
fingers crossed........

Still have no clue what's causing the instability.

Any further suggestions,.. anyone ?

Peter
 

Crev

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#6
I was having this exact same problem with a newly purchased MA780G-UD3H with the monitor plugged into D-Sub.
In post and other "dos" screens, the video was fine but as soon as Windows started installation the flickering and refreshes of the monitor started and continued..

I played around with the Onboard VGA Output Support option in the Advanced Bios section of the bios.
Eventually, setting it to D-Sub/HDMI solved the issue and the output is now stable.