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DVI slot on PC wont work.


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8 replies to this topic

#1 Caiterz

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Posted 23 August 2011 - 12:24 AM

I've got 2 monitors. One HP Pavilion F1503, One Dell(not sure of the model number at the moment)

Both monitors work perfectly by themselves in the VGA slot.

I bought a converter from the DVI-D to VGA, So that I can connect the other monitor. (Its the correct adapter and it fits 100%)

(http://www.techlocation.com/files/2011/07/HP-Pavilion-p7-1010-2.jpg Pic of the DVI-D slot)
(http://www.ebay.com/itm/170462273878?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649 Pic of the converter)


The monitor in the VGA slot, works fine.. The other is stuck on "Self test feature"

I've tried swapping monitors in the DVI slot, and both have the same results.


I know there's -some- sort of connection going through, because when I hit "Detect monitors" on the AMD Control Center, it almost "Refreshes" the Self Test feature screen.

but it wont detect it... I've tried installing both drivers for both monitors as well.



I Talked to HP support for over an hour, and all they said to me was "UR COMPY DUN SUPPORT IT LOLOLOLOL" Yet.. look


http://www.amazon.com/HP-Pavilion-p7-1010-Desktop-Black/dp/B0051OM5NA - (Supports multiple monitors for more workspace and easy multitasking)
http://h10032.www1.hp.com/ctg/Manual/c02943067.pdf (A poster that came with my computer)
http://g-ecx.images-amazon.com/images/G/01/electronics/detail-page/hp/p7-1010_r1_kh_04-20-11.pdf (The computers fact sheet)

Does that not scream "WE SUPPORT MULTIPLE MONITORS"? I think yes.

The tech - http://ompldr.org/vYTBrZw

anyway, afterwards i tried 1 more thing. The DVI by itself. Didnt work. He's such a liar, I hate HP's support. UGH!

So do you think maybe the adapter is bad? Or what?

and is there any phone # for HP's supervisors or something in which I can complain of blatent lies from the support?

Thanks :3

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#2 Platypus

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Posted 23 August 2011 - 02:44 AM

I bought a converter from the DVI-D to VGA

DVI-D does not have an analog signal to send to a VGA monitor. However the analog V-sync and ID is carried on the DVI block pins, so that could be the reason a monitor detection seems to find something.

I don't know what the adapter you have is attempting to do, you would need to use a meter to measure which pins the connection is being made to, it may be for some proprietary connection.

When you say you tried the DVI by itself, do you mean with a DVI monitor? It won't work with the adapter and a VGA monitor, even if the dedicated VGA out isn't connected to anything.

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#3 dpunisher

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Posted 23 August 2011 - 02:50 PM

Yup. DVI-D has no analog component. If your DVI output on the computer had the 4 pins (c1/c2/c3/c4) then it would work.
http://en.wikipedia.org/wiki/Digital_Visual_Interface

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#4 Caiterz

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Posted 23 August 2011 - 08:58 PM

Posted Image
Thats like what i have set up..

So exaplain to me the technicality of what's going on.

Is it just my computer cant take a VGA monitor with the DVI-D adapter?

Shouldnt the adapter just let it direct a "non HD" picture to my VGA instead of "nothing"?

I assume if i get a monitor with the DVI end on it already, it should work.. (but ive never seen them!)

Is there anything I can do to get this working with a VGA monitor?

Thanks~

Edited by Caiterz, 23 August 2011 - 08:59 PM.


#5 Platypus

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Posted 24 August 2011 - 08:56 AM

A DVI-D connector doesn't have any VGA signal on it - the analog VGA signal would be on the four pins that are missing, on either side of the flat bar. So the adapter can't pass a picture to your VGA monitor because there isn't one there. That will apply to any computer that has a DVI-D output. It's digital only.

If you got a monitor with either a DVI or HDMI input, you could connect it to the DVI-D output with the appropriate cable (DVI-D to DVI-D or DVI-D to HDMI) and it would work for you. The DVI and HDMI signals are the same.

To use a VGA monitor on a DVI signal, you can purchase a DVI to VGA converter (scaler/DAC), but they typically cost much the same as a monitor with a digital input, e.g:

http://www.networktechinc.com/dvi-vga.html

There are cheaper products, e.g:

http://mp4nation.net/catalog/index.php?main_page=product_info&cPath=79&products_id=576

which could be used in conjunction with a DVI to HDMI cable, however on-line reviews of some cheaper converters have suggested they gave unpredictable results.

What I believe the adapter you have now may be intended for is to adapt a VGA cable to carry a DVI signal, not to adapt to a VGA monitor. If the only available cable is VGA (e.g. a cable built into a wall) and a DVI signal must be used, one of those adapters at each end of the cable will provide a work-around.

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#6 Caiterz

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Posted 24 August 2011 - 03:20 PM

Ok, so im understanding that... if i get a VGA -> DVI on my monitor.. and then a DVI to VGA on my computer...

id have to get that cable up there for the middle?

#7 Platypus

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Posted 25 August 2011 - 08:26 AM

I don't really understand what you mean by your question.

If you want to use the VGA monitor on the DVI output from the computer, you will have to get one of the converters that creates an analog VGA signal from the digital DVI signal.

The ones that go straight from DVI to analog VGA seem to be expensive (probably because they are older technology), but looks like you would not need any extra lead, they include the necessary cables.

The cheaper ones I've seen on sale are to convert HDMI to VGA, but the HDMI signal is the same as DVI, so you would only need to get a cable to connect the computer's DVI socket to the HDMI on the converter, like this one:

http://www.ebay.com.au/itm/1-5M-DVI-HDMI-CABLE-Digital-HD-Cord-lead-Male-NEW-/320743084097?pt=AU_Components&hash=item4aadc71041

It would go computer DVI >> HDMI-VGA converter >> VGA monitor

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#8 Caiterz

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Posted 26 August 2011 - 09:53 PM

Ok, so you mean...

Like get this: http://www.ebay.com/itm/DVI-Male-HDMI-Female-M-F-Adapter-Converter-4-/140595973952?pt=LH_DefaultDomain_0&hash=item20bc2c4f40

and plug it into the computer

then get This: http://www.ebay.com/itm/Mini-hdmi-male-vga-svga-female-15-pin-cable-adapter-/230663505868?pt=UK_Computing_CablesConnectors_RL&hash=item35b49dc7cc

and plug it into the previous thing.. then plug my monitor into that?


If so, how does having the HDMI in there convert my monitors analog to "dvi capable"?

o.o

sorry for the questions, i are noob D:

#9 Platypus

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Posted 27 August 2011 - 06:01 AM

Ok, so you mean...

No, you would need to use a converter of the type that creates the required analog VGA signal from the digital, as I said and linked to above. A $2 DVI-HDMI adapter doesn't do this.

The HDMI in my example is only there to adapt to the less expensive type of converter, which does HDMI to analog VGA for the monitor. Converters which take a DVI input directly to VGA seem to be much more expensive. Compare the two types I link to in my post #5.

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