Hookup of Optima DLP and Windows XP computer

[Guest Ritter 197]

I have the above and when I turn on the DLP from Optima and then the

computer, either desktop or laptop, the DLP display goes through Searching

for the correct video input but never stops and finds it.

 

All is hooked up properly. the DLP is powered up first (as suggested) and

then the CPU (either desktop or laptop)

 

But I cannot get the projector to show me the windows desktop screen.

 

Any ideas?

[Guest Paul]

Re: Hookup of Optima DLP and Windows XP computer

 

Ritter 197 wrote:

> I have the above and when I turn on the DLP from Optima and then the

> computer, either desktop or laptop, the DLP display goes through

> Searching for the correct video input but never stops and finds it.

>

> All is hooked up properly. the DLP is powered up first (as suggested)

> and then the CPU (either desktop or laptop)

>

> But I cannot get the projector to show me the windows desktop screen.

>

> Any ideas?

 

Test with the laptop. Since the laptop has an LCD monitor,

you can see what is going on. Connect the DLP. Enter the

control panel for the video interface. Did you put the

GPU in "dual view" mode ? (Dual view mode is supposed to allow

independent resolutions for two display screens.) Can the GPU

see that something is connected to the port on the laptop ?

Chances are, the problem is at the computer end.

 

A DLP may not have a full VGA interface. It may have RGBHV

(three colors, two sync signals), but it might be missing the

DDC serial interface that computer monitors have. The computer

should, in theory, be able to impedance sense the RGB part,

and that should be enough to enable the VGA output. When the

DDC interface is not detected, one side effect of that, is

the interface may refuse to output a resolution higher than

a certain value.

 

Using a composite signal (RCA connector) or S-video, would be

a poor substitute for VGA or DVI. Text would not be clear at

all, if you did that. (I've tried it on my TV set, and

even 640x480 is unreadable.) But at least with those options,

some video control panels have a "force" function, to force

a signal to be present on the DIN connector on the desktop

video card faceplate. (The DIN supports S-video directly,

or composite via an adapter plug.)

 

For more detailed help, please include the model number of

the Optima, the model of laptop, or the make and model of

desktop video card on the desktop computer. That makes it

easier to craft a specific example of the options available.

 

HTH,

Paul

[Guest Big_Al]

Re: Hookup of Optima DLP and Windows XP computer

 

Ritter 197 wrote:

> I have the above and when I turn on the DLP from Optima and then the

> computer, either desktop or laptop, the DLP display goes through

> Searching for the correct video input but never stops and finds it.

>

> All is hooked up properly. the DLP is powered up first (as suggested)

> and then the CPU (either desktop or laptop)

>

> But I cannot get the projector to show me the windows desktop screen.

>

> Any ideas?

 

Check your resolution. Just a stab. We had a cheap projector at work

(not that yours is) and it only took 800x600 max. All of us used

1024x768 and it was a drag till we got a new one. But try setting a

standard size, not a wide screen size either, like 1280x800.

[Guest Bob I]

Re: Hookup of Optima DLP and Windows XP computer

 

Check the video cable ends/pins aren't damaged. Or swap/test cable.

 

Ritter 197 wrote:

> I have the above and when I turn on the DLP from Optima and then the

> computer, either desktop or laptop, the DLP display goes through

> Searching for the correct video input but never stops and finds it.

>

> All is hooked up properly. the DLP is powered up first (as suggested)

> and then the CPU (either desktop or laptop)

>

> But I cannot get the projector to show me the windows desktop screen.

>

> Any ideas?

[Guest Ritter 197]

Re: Hookup of Optima DLP and Windows XP computer

 

Dear Paul:

 

I have the DLP here now (it was at a friend where I tried to hook it up w/o

success)

The OPTOMA by HP is a model EP721.

The laptop is also a HP Pavilion dv6000.

The S is Windows XP with SP# 1 -3.

 

When I start up the laptop I can see the beginning of the Sign-on , namely

Windows XP screen.

 

But when I am at the desktop I see none of it via the DLP against the wall

screen, but the DLP is lit and I can see the blue background and the

searching.

 

In the control panel I have both monitors activated.

 

A few months ago I used this same DLP and the same laptop and had no trouble

at all. Watched a Power Point Presentation then.

 

But this time I just cannot image what is wrong.

 

Your help is appreciated. Thanks in advance.

 

"Paul" <nospam@needed.com> wrote in message news:ge0iq5$br5$1@aioe.org...

> Ritter 197 wrote:

>> I have the above and when I turn on the DLP from Optima and then the

>> computer, either desktop or laptop, the DLP display goes through

>> Searching for the correct video input but never stops and finds it.

>>

>> All is hooked up properly. the DLP is powered up first (as suggested) and

>> then the CPU (either desktop or laptop)

>>

>> But I cannot get the projector to show me the windows desktop screen.

>>

>> Any ideas?

>

> Test with the laptop. Since the laptop has an LCD monitor,

> you can see what is going on. Connect the DLP. Enter the

> control panel for the video interface. Did you put the

> GPU in "dual view" mode ? (Dual view mode is supposed to allow

> independent resolutions for two display screens.) Can the GPU

> see that something is connected to the port on the laptop ?

> Chances are, the problem is at the computer end.

>

> A DLP may not have a full VGA interface. It may have RGBHV

> (three colors, two sync signals), but it might be missing the

> DDC serial interface that computer monitors have. The computer

> should, in theory, be able to impedance sense the RGB part,

> and that should be enough to enable the VGA output. When the

> DDC interface is not detected, one side effect of that, is

> the interface may refuse to output a resolution higher than

> a certain value.

>

> Using a composite signal (RCA connector) or S-video, would be

> a poor substitute for VGA or DVI. Text would not be clear at

> all, if you did that. (I've tried it on my TV set, and

> even 640x480 is unreadable.) But at least with those options,

> some video control panels have a "force" function, to force

> a signal to be present on the DIN connector on the desktop

> video card faceplate. (The DIN supports S-video directly,

> or composite via an adapter plug.)

>

> For more detailed help, please include the model number of

> the Optima, the model of laptop, or the make and model of

> desktop video card on the desktop computer. That makes it

> easier to craft a specific example of the options available.

>

> HTH,

> Paul

[Guest Paul]

Re: Hookup of Optima DLP and Windows XP computer

 

Ritter 197 wrote:

> Dear Paul:

>

> I have the DLP here now (it was at a friend where I tried to hook it up

> w/o success)

> The OPTOMA by HP is a model EP721.

> The laptop is also a HP Pavilion dv6000.

> The S is Windows XP with SP# 1 -3.

>

> When I start up the laptop I can see the beginning of the Sign-on ,

> namely Windows XP screen.

>

> But when I am at the desktop I see none of it via the DLP against the

> wall screen, but the DLP is lit and I can see the blue background and

> the searching.

>

> In the control panel I have both monitors activated.

>

> A few months ago I used this same DLP and the same laptop and had no

> trouble at all. Watched a Power Point Presentation then.

>

> But this time I just cannot image what is wrong.

>

> Your help is appreciated. Thanks in advance.

 

EP721 Projector

http://www.optomausa.com/Product_detail.asp?product_id=337

 

DVI w/HDCP, VGA-in, VGA-out, S-Video, Audio-in, RS-232, USB

Native SVGA 800x600 to 1600x1200 resized

 

http://marketing.optomausa.com/PDFs/usermanuals/Optoma_EP721_Manual.PDF

 

I would be testing with an 800x600 resolution, 60Hz should be

good enough.

 

The EP721 has an RS-232 interface on it

(9600 baud, 8 data bits, parity N for none, 1 stop bit)

(No flow control signals, just TXD, RXD, and ground on the cable)

 

You can send RS-232 commands to the unit, to see what it thinks

is going on. The user manual, PDF page 52, has examples of

"READ from projector" commands.

 

~00121 1

 

would return the currently selected input source, from the

ones listed above (DVI, VGA, S-Video etc).

 

Since the DV-6000 doesn't have a serial port, you'd either

need a USB to RS-232 serial adapter (and a copy of Hyperterm),

or you could use the RS-232 on the desktop computer for the job.

The projector should have a three pin to 9 pin adapter, to put

the serial RS-232 port in a more familiar form factor (DB-9).

 

If you see two monitors shown in the Display control panel,

that means the GPU has detected the presence of the second

display. On my video card right now, nothing is connected

to the second port, so the second monitor is greyed out. If

I connect my "fake" test connector to the video card (a

connector with terminator resistors on RGB), the second monitor

becomes available for mode changes in the control panel. For

example, I could drag the icon for the second monitor, and

set up "Dual View", where each output is independent.

 

I understand some aspects of the Vista display model, may be

backported to WinXP. Some users in the Nvidia group were complaining

that "mirror mode" had been removed from the Nvidia WinXP driver.

I'm only mentioning that, to indicate that nothing stays the same

forever. If you're constantly changing drivers, you might

have been caught in this DRM squeeze play. Using an older

driver might fix that.

 

The DV6000 uses optional Nvidia Geforce Go 7200 GPU, or standard

6150 (chipset) graphics. So I might try an older driver, and see

if there is a difference in symptoms after the driver change.

 

http://www.hp.com/hpinfo/newsroom/press_kits/2006/mobility/fs_dv6000.pdf

 

The laptop may have a function key, which sends output only

to the external connector, which is another thing you could try.

(fn+F4).

 

The laptop may be part of the issue with Nvidia GPUs and

their underfill material. The cheap bastards will give you

a BIOS update, which causes the fan on the laptop to run

faster/more often, in an attempt to keep the GPU cooler,

and thus avoid HP having to foot the bill for a GPU chip

replacement. This is, of course, only in HP's (and Nvidia's)

best interest, and has nothing to do with keeping the customer

happy. After the warranty has expired, they've be only too happy

if the GPU fails. In your symptom description, there is nothing

that indicated this kind of problem, and I'd expect to see

problems with the LCD panel if the chip was about to blow.

 

http://h10025.www1.hp.com/ewfrf/wc/document?lc=en&cc=us&docname=c01087277&dlc=en

 

To see if the EP721 has DDC (serial interface carrying monitor

specs) and EDID, you can use this program. If the monitor name,

or a menu item does not appear, then chances are the DLP doesn't

have DDC. At this point, this might be a secondary annoyance, as

the impedance sensing function (the laptop noting that RGB

have loading on them), should be enough to get your project

off the ground.

 

http://www.entechtaiwan.com/util/moninfo.shtm

 

I'm sorry the above rambles on a bit, but it is one of

those things where you'll have to "poke it with a stick"

and see what happens. The first part of solving any

problem, is gathering enough symptoms. The only concrete

suggestion in the above, is to try a different driver.

 

If you're able to make the DLP work with the desktop

system, that would be a large step forward.

 

The DV6000 has an "Expansion Port", which has a few other

output options, but I don't think they really help matters,

since S-video or composite, just isn't good enough to be

able to read text.

 

Paul

>

> "Paul" <nospam@needed.com> wrote in message news:ge0iq5$br5$1@aioe.org...

>> Ritter 197 wrote:

>>> I have the above and when I turn on the DLP from Optima and then the

>>> computer, either desktop or laptop, the DLP display goes through

>>> Searching for the correct video input but never stops and finds it.

>>>

>>> All is hooked up properly. the DLP is powered up first (as suggested)

>>> and then the CPU (either desktop or laptop)

>>>

>>> But I cannot get the projector to show me the windows desktop screen.

>>>

>>> Any ideas?

>>

>> Test with the laptop. Since the laptop has an LCD monitor,

>> you can see what is going on. Connect the DLP. Enter the

>> control panel for the video interface. Did you put the

>> GPU in "dual view" mode ? (Dual view mode is supposed to allow

>> independent resolutions for two display screens.) Can the GPU

>> see that something is connected to the port on the laptop ?

>> Chances are, the problem is at the computer end.

>>

>> A DLP may not have a full VGA interface. It may have RGBHV

>> (three colors, two sync signals), but it might be missing the

>> DDC serial interface that computer monitors have. The computer

>> should, in theory, be able to impedance sense the RGB part,

>> and that should be enough to enable the VGA output. When the

>> DDC interface is not detected, one side effect of that, is

>> the interface may refuse to output a resolution higher than

>> a certain value.

>>

>> Using a composite signal (RCA connector) or S-video, would be

>> a poor substitute for VGA or DVI. Text would not be clear at

>> all, if you did that. (I've tried it on my TV set, and

>> even 640x480 is unreadable.) But at least with those options,

>> some video control panels have a "force" function, to force

>> a signal to be present on the DIN connector on the desktop

>> video card faceplate. (The DIN supports S-video directly,

>> or composite via an adapter plug.)

>>

>> For more detailed help, please include the model number of

>> the Optima, the model of laptop, or the make and model of

>> desktop video card on the desktop computer. That makes it

>> easier to craft a specific example of the options available.

>>

>> HTH,

>> Paul

>

[Guest Ritter 197]

Re: Hookup of Optima DLP and Windows XP computer

 

I finally figured out how to connect the DLP and either the HP laptop or HP

desktop:

 

 

For Laptop: Set via Control Panel to 800X600; Click FN key + F4 for HP

laptop

Right click mouse, Select Multiple Display; Primary Notebook, secondary

Monitor

Now you can see computer screen and also DPL screen

 

For Desktop: Hook up video cable from DPL to main computer on top of HDMI

Adaptor. Resolution can stay 1280X960. Mouse will control DPL screen

 

I thank you, Paul, for the detailed information and hyperlinks. I just now

printed it out and will investigate in more detail.

 

Thanks a lot!!!!

 

 

"Paul" <nospam@needed.com> wrote in message news:ge5j12$4i3$1@aioe.org...

> Ritter 197 wrote:

>> Dear Paul:

>>

>> I have the DLP here now (it was at a friend where I tried to hook it up

>> w/o success)

>> The OPTOMA by HP is a model EP721.

>> The laptop is also a HP Pavilion dv6000.

>> The S is Windows XP with SP# 1 -3.

>>

>> When I start up the laptop I can see the beginning of the Sign-on ,

>> namely Windows XP screen.

>>

>> But when I am at the desktop I see none of it via the DLP against the

>> wall screen, but the DLP is lit and I can see the blue background and the

>> searching.

>>

>> In the control panel I have both monitors activated.

>>

>> A few months ago I used this same DLP and the same laptop and had no

>> trouble at all. Watched a Power Point Presentation then.

>>

>> But this time I just cannot image what is wrong.

>>

>> Your help is appreciated. Thanks in advance.

>

> EP721 Projector

> http://www.optomausa.com/Product_detail.asp?product_id=337

>

> DVI w/HDCP, VGA-in, VGA-out, S-Video, Audio-in, RS-232, USB

> Native SVGA 800x600 to 1600x1200 resized

>

> http://marketing.optomausa.com/PDFs/usermanuals/Optoma_EP721_Manual.PDF

>

> I would be testing with an 800x600 resolution, 60Hz should be

> good enough.

>

> The EP721 has an RS-232 interface on it

> (9600 baud, 8 data bits, parity N for none, 1 stop bit)

> (No flow control signals, just TXD, RXD, and ground on the cable)

>

> You can send RS-232 commands to the unit, to see what it thinks

> is going on. The user manual, PDF page 52, has examples of

> "READ from projector" commands.

>

> ~00121 1

>

> would return the currently selected input source, from the

> ones listed above (DVI, VGA, S-Video etc).

>

> Since the DV-6000 doesn't have a serial port, you'd either

> need a USB to RS-232 serial adapter (and a copy of Hyperterm),

> or you could use the RS-232 on the desktop computer for the job.

> The projector should have a three pin to 9 pin adapter, to put

> the serial RS-232 port in a more familiar form factor (DB-9).

>

> If you see two monitors shown in the Display control panel,

> that means the GPU has detected the presence of the second

> display. On my video card right now, nothing is connected

> to the second port, so the second monitor is greyed out. If

> I connect my "fake" test connector to the video card (a

> connector with terminator resistors on RGB), the second monitor

> becomes available for mode changes in the control panel. For

> example, I could drag the icon for the second monitor, and

> set up "Dual View", where each output is independent.

>

> I understand some aspects of the Vista display model, may be

> backported to WinXP. Some users in the Nvidia group were complaining

> that "mirror mode" had been removed from the Nvidia WinXP driver.

> I'm only mentioning that, to indicate that nothing stays the same

> forever. If you're constantly changing drivers, you might

> have been caught in this DRM squeeze play. Using an older

> driver might fix that.

>

> The DV6000 uses optional Nvidia Geforce Go 7200 GPU, or standard

> 6150 (chipset) graphics. So I might try an older driver, and see

> if there is a difference in symptoms after the driver change.

>

> http://www.hp.com/hpinfo/newsroom/press_kits/2006/mobility/fs_dv6000.pdf

>

> The laptop may have a function key, which sends output only

> to the external connector, which is another thing you could try.

> (fn+F4).

>

> The laptop may be part of the issue with Nvidia GPUs and

> their underfill material. The cheap bastards will give you

> a BIOS update, which causes the fan on the laptop to run

> faster/more often, in an attempt to keep the GPU cooler,

> and thus avoid HP having to foot the bill for a GPU chip

> replacement. This is, of course, only in HP's (and Nvidia's)

> best interest, and has nothing to do with keeping the customer

> happy. After the warranty has expired, they've be only too happy

> if the GPU fails. In your symptom description, there is nothing

> that indicated this kind of problem, and I'd expect to see

> problems with the LCD panel if the chip was about to blow.

>

> http://h10025.www1.hp.com/ewfrf/wc/document?lc=en&cc=us&docname=c01087277&dlc=en

>

> To see if the EP721 has DDC (serial interface carrying monitor

> specs) and EDID, you can use this program. If the monitor name,

> or a menu item does not appear, then chances are the DLP doesn't

> have DDC. At this point, this might be a secondary annoyance, as

> the impedance sensing function (the laptop noting that RGB

> have loading on them), should be enough to get your project

> off the ground.

>

> http://www.entechtaiwan.com/util/moninfo.shtm

>

> I'm sorry the above rambles on a bit, but it is one of

> those things where you'll have to "poke it with a stick"

> and see what happens. The first part of solving any

> problem, is gathering enough symptoms. The only concrete

> suggestion in the above, is to try a different driver.

>

> If you're able to make the DLP work with the desktop

> system, that would be a large step forward.

>

> The DV6000 has an "Expansion Port", which has a few other

> output options, but I don't think they really help matters,

> since S-video or composite, just isn't good enough to be

> able to read text.

>

> Paul

>

>>

>> "Paul" <nospam@needed.com> wrote in message news:ge0iq5$br5$1@aioe.org...

>>> Ritter 197 wrote:

>>>> I have the above and when I turn on the DLP from Optima and then the

>>>> computer, either desktop or laptop, the DLP display goes through

>>>> Searching for the correct video input but never stops and finds it.

>>>>

>>>> All is hooked up properly. the DLP is powered up first (as suggested)

>>>> and then the CPU (either desktop or laptop)

>>>>

>>>> But I cannot get the projector to show me the windows desktop screen.

>>>>

>>>> Any ideas?

>>>

>>> Test with the laptop. Since the laptop has an LCD monitor,

>>> you can see what is going on. Connect the DLP. Enter the

>>> control panel for the video interface. Did you put the

>>> GPU in "dual view" mode ? (Dual view mode is supposed to allow

>>> independent resolutions for two display screens.) Can the GPU

>>> see that something is connected to the port on the laptop ?

>>> Chances are, the problem is at the computer end.

>>>

>>> A DLP may not have a full VGA interface. It may have RGBHV

>>> (three colors, two sync signals), but it might be missing the

>>> DDC serial interface that computer monitors have. The computer

>>> should, in theory, be able to impedance sense the RGB part,

>>> and that should be enough to enable the VGA output. When the

>>> DDC interface is not detected, one side effect of that, is

>>> the interface may refuse to output a resolution higher than

>>> a certain value.

>>>

>>> Using a composite signal (RCA connector) or S-video, would be

>>> a poor substitute for VGA or DVI. Text would not be clear at

>>> all, if you did that. (I've tried it on my TV set, and

>>> even 640x480 is unreadable.) But at least with those options,

>>> some video control panels have a "force" function, to force

>>> a signal to be present on the DIN connector on the desktop

>>> video card faceplate. (The DIN supports S-video directly,

>>> or composite via an adapter plug.)

>>>

>>> For more detailed help, please include the model number of

>>> the Optima, the model of laptop, or the make and model of

>>> desktop video card on the desktop computer. That makes it

>>> easier to craft a specific example of the options available.

>>>

>>> HTH,

>>> Paul

>>