second monitor no longer works

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second monitor no longer works

Post by GMK on 23rd December 2009, 8:08 am

PC: (eMachine/Gateway T3120; AMD Sempron 1.8GHz CPU; 2GB RAM; 100GB HD, 50% full; 550W PSU; windows XP Home, SP3)
monitors: 2 identical Samsung 19" 1280 X 1024 LCD, standard format
video card: nVidia GeForce 7600GS 512mb

I have been using this set-up for the past 3 years; one monitor is hooked up to the video card with a 25 pin VGA (or RGB) connector; the second with a DVI connector. No overclocking; no games.

A few months ago, on start up, one monitor went black after about 10" to 15". Since then I have been swapping cables and monitors, but the results are always the same: the monitor connected to the 25pin VGA outlet of the video card stops working after the selftesting of the PC (after about 10"). The monitor connected to the DVI outlet has no problems. On start up, there are no beep (error) codes (speakers and headphones are OK).
Other than the above the PC runs OK on 1 monitor.

Since then I have run the latest nVidia driver, removed a virus and cleaned my PC with CC. The problem still persists. Also checked "System Information", but could not find anything out of the ordinary (to the extent that I know what I was looking at). This PC has never had any heating problems; all fans still work, including the fan of the videocard. With the 2 monitors working the CPU usage varied between 2 and 60% (as per Windows Task Manager/Performance).

Is there anything else I can do to make the second monitor work again or at least pinpoint the problem? Any way to determine if this is caused by hardware, software or malware?

Thanks in advance,

GMK

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Re: second monitor no longer works

Post by GMK on 26th December 2009, 6:10 pm

Cheesy Grin (sparkly *bump* Hooray!

The only other thing I can think of are, try another video card and/or try different sticks of RAM. Since that would involve spending money first for uncertain results, I would rather first exhaust all possible troubleshooting.

Thanks in advance and happy hollidays,


G.

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Re: second monitor no longer works

Post by GMK on 25th January 2010, 9:30 am

bump

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Re: second monitor no longer works

Post by E-mu on 25th January 2010, 9:52 am

I would try connecting just a single monitor to the VGA port and see if this works (not mentioned in your posts) if not then replace the card is the only option I can see.

Another way I would test this is to buy another card, make sure I can return it if it's not required, use this card to test if everything else works together, if so then this will again confirm the current card needs replacing, if not then return the card and keep looking.

Sorry if this doesn't seem helpful but these are the next steps I'd take after what you have already done.

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Re: second monitor no longer works

Post by GMK on 25th January 2010, 5:22 pm

Thank you for having a look at this.

I indeed did not try the "single monitor to the VGA port" procedure. QUESTION: I assume you are talking about the VGA port of the video card? (and not about the VGA port of the motherboard).

Thanks in advance for your reply.

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Re: second monitor no longer works

Post by E-mu on 25th January 2010, 5:29 pm

Yeh the VGA port on the card.

It may be the port thats knackered....

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