MSI Lightning 7970 3 Screen setup, 1 goes black (no signal)

Hello!
I'm having some troubles with my msi 7970 lightining card.
The first problem appeared 2 months ago where one of my screens went black all of a sudden(no signal was showing on the screen).
At this time i had all monitors connected to my XFX minidp to dvi (active). After alot of testing i figured out that one of the adapters was the problem.
This specific adapter was tested on all of my monitors and the problem of a screen going black was changing monitor. Remember the problem wasnt a blank screen all the time but after maybe 10-15 minutes in windows. Sometimes it went blank directly and not even a reboot would solve the problem.
So the setup i had working after this troubleshooting was that i was runing 2 minidp to dvi and one in the regular dvi. This worked fine up untill this morning.
I also have to say that during this time i did some overclocking with msi afteburner however i always did a stability test with kombustor to see that the card was stable. Now the overclock i had was only 30 mhz over stock (1070) so i would be VERY surpriced that if this would be the reason for why the gfx card is acting wierd again.
However since i got this problem again i did reset on the gfx to ensure that this wasnt the problem.
The problem still resided so started the regular troubleshooting with the minidps and i pretty much did what i had done before.
The conclusion was that one of the adapters that i had left had become faulty.. But however what are the odds that 2 adapters goes bad within 2 months?
So now im sitting here at work writing this post since i am at an end to what i should do and i would like to ask for some advice from you guys
//Martin

Quote from: zorgin on 07-November-12, 20:59:42
That, Sir, I am not entirely sure of. I cannot answer this to be honest since i never figured that one of the ports would be the problem.
About the ground line im not really sure what you mean, cant say that i am an electrician :P
my first thinking about your problem is it may be from one of the mini dp ports or from one of the monitor. so if you had know about it we might have been solved the issue.
from the ground i mean is your electric line grounded. if had see some situations where electric drains from graphics cards ports when the line is not grounded.

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http://www.amazon.co.uk/Dell-BizLink-DisplayPort-Adapter-Powered/dp/B003XYBA72/ref=sr_1_4?ie=UTF8&qid=1359592165&sr=8-4
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