Connecting LG monitors to a computer via DVI or VGA


T

t

We have two LG monitors(LG 55LN5600 - 55" Class ( 54.6" viewable )
LED-backlit LCD flat panel display
http://accessories.us.dell.com/sna/productdetail.aspx?c=us&l=en&s=dhs&cs=19&sku=a7069206
and LG 47LN5400 http://www.lg.com/us/tvs/lg-47LN5400-led-tv)

We want to connect them to a computer(Dell Optiplex 980) via DVI port so
that a user can load his presentation which can be viewed on the large
monitors. The monitors have HDMI port, but our computers(both Dell
optiplex 980) do not.

1. I realize I can get a HDMI to DVI cable
http://www.staples.com/Tripp-Lite-DVI-D-Male-to-HDMI-Female-Gold-Adapter/product_209341
but would that be enough or a different cable would be needed
to support the resolution of the monitors?

2. Is there a way to connect the computer to the monitors using
Component Video In(Y, Pb, Pr + Audio), USB 3.0/2.0 Input or getting a
DVI to HDMI cable is the advisable way for our task(viewing
a presentation, spreadsheet loaded to the computer)

Any advice would be appreciated.

Thanks
 
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P

Paul

t said:
We have two LG monitors(LG 55LN5600 - 55" Class ( 54.6" viewable )
LED-backlit LCD flat panel display
http://accessories.us.dell.com/sna/productdetail.aspx?c=us&l=en&s=dhs&cs=19&sku=a7069206
and LG 47LN5400 http://www.lg.com/us/tvs/lg-47LN5400-led-tv)

We want to connect them to a computer(Dell Optiplex 980) via DVI port so
that a user can load his presentation which can be viewed on the large
monitors. The monitors have HDMI port, but our computers(both Dell
optiplex 980) do not.

1. I realize I can get a HDMI to DVI cable
http://www.staples.com/Tripp-Lite-DVI-D-Male-to-HDMI-Female-Gold-Adapter/product_209341
but would that be enough or a different cable would be needed
to support the resolution of the monitors?

2. Is there a way to connect the computer to the monitors using
Component Video In(Y, Pb, Pr + Audio), USB 3.0/2.0 Input or getting a
DVI to HDMI cable is the advisable way for our task(viewing
a presentation, spreadsheet loaded to the computer)

Any advice would be appreciated.

Thanks

The Wikipedia articles can help with the caveats.
You'd want to read a good portion of this.

http://en.wikipedia.org/wiki/Dvi

"For example, a 1080p HDMI display can be driven by a
single-link DVI-D source - since HDMI and DVI-D both define
an overlapping minimum set of supported resolutions and
frame buffer formats."

That's good enough for a basic test.

The max useful single-link resolution is 1920x1200, slightly
larger than 1080p. Both TVs should fit comfortably within
the spec limits.

"WUXGA (1,920 × 1,200) @ 60 Hz with CVT-RB blanking (154 MHz) <--- max val
HDTV (1,920 × 1,080) @ 60 Hz with CVT-RB blanking (139 MHz) <--- your TV
"

If you own an HDMI cable, then the absolutely cheapest solution
would be an adapter like this, right at the video card. At least the
DVI end looks right for the video card. I don't have any HDMI here
to comment on the polarity of HDMI cabling.

"DVI-D Male to HDMI 19P Female Adapter"
http://www.newegg.com/Product/Product.aspx?Item=N82E16812213001

If you didn't have HDMI/DVI/DisplayPort, that's when you start
looking at the YPbPr coax inputs... No reason to panic yet.

Paul
 
T

t

Thanks Paul,


If you own an HDMI cable, then the absolutely cheapest solution
would be an adapter like this, right at the video card. At least the
DVI end looks right for the video card. I don't have any HDMI here
to comment on the polarity of HDMI cabling.

"DVI-D Male to HDMI 19P Female Adapter"
http://www.newegg.com/Product/Product.aspx?Item=N82E16812213001

Yes, there is a HDMI cable which is connected to the TV monitor. We just
need to get an adapter like the one you linked so that HDMI cable can
connect to the computer which has a DVI adapter(which in turn is
connected to the VGA port of the computer).

So, the connection would be

VGA port of computer->DVI adapter->DVI-D male to HDMI 19p female(you
suggested)-> HDMI cable which connects to the TV monitor.

Would this work?

Thanks
 
T

t

DVI and HDMI are electrically very similar, so I would attempt that
style of connection first. Your video card should poll the monitor to
find out what resolutions are supported and update the PC's interface
accordingly.

Still, try it before you rely on it.
Thanks, I will do that. Does brand name matter or Tripp-Lite is fine for
cables such as these?
 
P

Paul

t said:
Thanks Paul,




Yes, there is a HDMI cable which is connected to the TV monitor. We just
need to get an adapter like the one you linked so that HDMI cable can
connect to the computer which has a DVI adapter(which in turn is
connected to the VGA port of the computer).

So, the connection would be

VGA port of computer->DVI adapter->DVI-D male to HDMI 19p female(you
suggested)-> HDMI cable which connects to the TV monitor.

Would this work?

Thanks

Woah. I think something is wrong here. VGA is analog, the other
connectors digital. Nothing is going to come out the end :-(

*******

Tell us again what connectors are available on the computer.

Is it VGA and DisplayPort on the computer ?

Or is it DVI on the computer ?

DVI connector
http://upload.wikimedia.org/wikiped...r_Types.svg/181px-DVI_Connector_Types.svg.png

VGA 15 pin (three rows of five)
http://upload.wikimedia.org/wikipedia/commons/thumb/8/81/Vga-cable.jpg/220px-Vga-cable.jpg

HDMI
http://upload.wikimedia.org/wikiped...inout.svg/310px-HDMI_Connector_Pinout.svg.png

DisplayPort
http://upload.wikimedia.org/wikiped...ector.svg/300px-DisplayPort_Connector.svg.png

***************************************

If a computer has VGA output (analog), you would need to
connect that to a conversion box (digital), to obtain a
digital format (if that is what you really want).
With some limitations as to maximum resolution.
VGA conversion boxes might range from $100 to $300,
with the latter ones offering a better feature mix
(scaler).

http://www.spacehifi.com.au/av-distribution/audio-and-video-converters/vga-to-hdmi-converter

"Supported VGA Input Resolutions
640x480 (60/75Hz),
800x600 (60/75Hz),
1024x768 (60Hz),
...
1920x1080 (60Hz) <--- use this one

Supported HDMI Output Resolution
720p: 1280x720 (60Hz)
1080p: 1920x1080 (60Hz) <--- and this one

Power Supply 5V DC, 1A included
"

VGA is not really all that useful, unless the
TV set has VGA on it.

DisplayPort can be converted to other formats.
Some of the conversions use passive adapters (cheap).
Other conversions use active adapters ($100+).
See the Wikipedia.org article on DisplayPort
for more information. I think DisplayPort
to HDMI is a passive conversion, so purchasing
the adapter will be cheap.

When you've decided on a "from-to", post back
with your proposed connector, converter, and cable "chain" :)

Paul
 
T

t

Woah. I think something is wrong here. VGA is analog, the other
connectors digital. Nothing is going to come out the end :-(

*******

Tell us again what connectors are available on the computer.

Is it VGA and DisplayPort on the computer ?

Or is it DVI on the computer ?

Sorry, I erred in the description.

The connection now is DVI port of computer->DVI to VGA cable
adapter->VGA cable going to monitor

What would be changed is
DVI port of computer-> DVI Male to HDMI Female Cable Adaptor(like the
one at http://www.newegg.com/Product/Product.aspx?Item=N82E16812270286)
->HDMI cable coming from the LG Monitor

So, would a product like
http://www.newegg.com/Product/Product.aspx?Item=N82E16812270286 work or
does brand name matter for things such as these?

I appreciate your time and assistance.
 
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P

Paul

t said:
Sorry, I erred in the description.

The connection now is DVI port of computer->DVI to VGA cable
adapter->VGA cable going to monitor

What would be changed is
DVI port of computer-> DVI Male to HDMI Female Cable Adaptor(like the
one at http://www.newegg.com/Product/Product.aspx?Item=N82E16812270286)
->HDMI cable coming from the LG Monitor

So, would a product like
http://www.newegg.com/Product/Product.aspx?Item=N82E16812270286 work or
does brand name matter for things such as these?

I appreciate your time and assistance.

The one you've selected looks good, and I'd just
get one and try it out.

*******

DVI to HDMI would be purely passive. It's a change of
connector format. DVI has room for two sets ("links")
of digital pins, and one set is brought through to the
HDMI side. HDMI has a CEC pin, but there is no equivalent
on DVI, and no need for it in the computer case (we don't
expect the computer to shut off, when you turn off
the switch on the monitor :) ). Both connector
formats have serial clock and data for sending EDID.

DVI capability

VGA ---X
DVI-D #1 ------------ To HDMI pins (1920 max)
DVI-D #2 ---X
SDA/SCL ------------ To HDMI (EDID config info path)

The DVI that plugs into the video card is male.
So that end looks good. I can't be certain about
the HDMI - I don't have any HDMI cables here.

Here is the other flavor of adapter, which
plugs into a HDMI video card, giving DVI to
the display. This is an example of the one
you don't want. Notice how the DVI side on this
one, has screw holes for retention, which tells you
that the "DVI side is the cabling side".

http://www.newegg.com/Product/Product.aspx?Item=9SIA31B1051770

Within reason, the brand should not matter. If the
materials are inferior (cheap pins that snap off),
that could be a potential issue. The DVI connectors
I have here, seem to be pretty good quality, and
I can't say I've seen one that made me wonder how
long it would last. Whereas with VGA, I've seen some
pretty sad looking connectors (pins that push backwards
into the connector body).

Paul
 
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T

t

The one you've selected looks good, and I'd just
get one and try it out.

*******

Thanks Paul:

This is very helpful.

You are a great resource to all people in this newsgroup.

I appreciate your assistance and time.
 

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