Help need with monitor issues ( error code 10, hardware issues)

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HI i'm trying to use an older style monitor with my computer as it is
touchscreen enabled for our disabled child.

I have tried simply setting it up by connecting the VGA cable to the comm
port that had my regular monitor attached..........when i do this i get a
blank screen on the monitor, the only thing that works is the screen menu
function to change screen dimensions, it doesn't have the usual desktop
screen...just blank.

If you power up the monitor with no cables connected to comp then you get a
picture, square grid that flashes black and white.

When the touchscreen monitor is connected to comp you can even use it as a
touch screen in that when you touch the screen it seems to activate something
in the desktop cos you hear it beeping.

I can attach the touch screen cable to the seriel port and attach my regular
monitor to the VGA and actually use the other screen as a mouse.......but i
cant get the other monitor to work.

I need to get the one monitor that has the touch screen working.

With me so far?

When i try to get the touch screen monitor working alongside the regular one
to check in device manager what is happening it comes up with a error code
10.

I have tried to install new drivers but none are found.....

The guy who sold me the touchscreen said to change the video card settings
to 800x600 pixels as the screen resolution may be too big for the
touchscreen.......have tried doing this in display settings but to no avail.

I would use the troubleshoot function but it appears to be dead on my
comp.........doesn't open.

I just want to be able to plug the new monitor in and use it as a full
touchscreen monitor....

have tried un-installing, re-starting and nothing happens, still a blank
screen unless you go into the monitors menu and all you can do then is change
the colour, size etc does not show any usual desktop icons etc.nothing

Touch screen monitor is a NEC multisync V721
Comp is NEC powermate, windows XP, regular screen is LG flat screen.

Any help would be great, we'll finally be able to show our daughter how to
communicate........

Thanks

Zoe
 
zoepiglet said:
HI i'm trying to use an older style monitor with my computer as it is
touchscreen enabled for our disabled child.

I have tried simply setting it up by connecting the VGA cable to the comm
port that had my regular monitor attached..........when i do this i get a
blank screen on the monitor, the only thing that works is the screen menu
function to change screen dimensions, it doesn't have the usual desktop
screen...just blank.

If you power up the monitor with no cables connected to comp then you get a
picture, square grid that flashes black and white.

When the touchscreen monitor is connected to comp you can even use it as a
touch screen in that when you touch the screen it seems to activate something
in the desktop cos you hear it beeping.

I can attach the touch screen cable to the seriel port and attach my regular
monitor to the VGA and actually use the other screen as a mouse.......but i
cant get the other monitor to work.

I need to get the one monitor that has the touch screen working.

With me so far?

When i try to get the touch screen monitor working alongside the regular one
to check in device manager what is happening it comes up with a error code
10.

I have tried to install new drivers but none are found.....

The guy who sold me the touchscreen said to change the video card settings
to 800x600 pixels as the screen resolution may be too big for the
touchscreen.......have tried doing this in display settings but to no avail.

I would use the troubleshoot function but it appears to be dead on my
comp.........doesn't open.

I just want to be able to plug the new monitor in and use it as a full
touchscreen monitor....

have tried un-installing, re-starting and nothing happens, still a blank
screen unless you go into the monitors menu and all you can do then is change
the colour, size etc does not show any usual desktop icons etc.nothing

Touch screen monitor is a NEC multisync V721
Comp is NEC powermate, windows XP, regular screen is LG flat screen.

Any help would be great, we'll finally be able to show our daughter how to
communicate........

Thanks

Zoe
Click to expand...

If you set the resolution to 800x600 on the existing display, then plug the
touchscreen into that video connector, does that work ?

When you get the code 10 in Device Manager - where does it show up ?

To find examples of what the control panels might look like, it would help
to know which model of NEC powermate this is. There are a ton of different
model numbers. And using utilities to list the hardware in the box, is better
than someone here trying to figure it out with web searches.

There is an article here, showing a couple of tricks. The Display control
panel would show two monitors, if both had been detected, and both hardware
and software supported two displays. In the picture here, one of the displays
is greyed out.

http://www.playtool.com/pages/installgraphics/install.html

These utilities will give you some info about the hardware inside the computer.
CPUZ will help identify the motherboard and motherboard chipset. The other
two may be able to help with cards that are plugged in, such as what kind
of video card this is. The Display Manager in Windows can also give
some info. (Everest - Devices:PCI will show a lot of hardware - it includes
my AGP video card.)

http://www.sisoftware.net/dload/sware_figure.php?&a=&langx=en (Sandra Lite)
http://www.majorgeeks.com/download.php?det=4181 (Everest)
http://www.cpuid.com/download/cpu-z-140.zip (CPUZ)

To give an example, I can look in my Device Manager. I see

Display adapters
Radeon 9800 Pro
Radeon 9800 Pro - Secondary

Those correspond to the ability to drive two monitor connectors off the
same faceplate on the video card. If I do "Properties" on those two, the
same drivers are used for both of them.

Some video devices have nice manuals, and some don't. But knowing a bit
more about your machine, may make it easier to dig up stuff to help.

Paul
 
HI the monitor doesn't work no matter what screen setting its on before
plugging it in.........i obviously know the port is ok cos this one works
fine.

NEC powermate ML7 N8001

Surely if the monitor is working then plugging into the VGA whatever the
pixels it should show something?

This is what a friend had to say..................

'Even when the pc first boots ... regardless of the "pixel rate", bios
graphics are standard and will be read by any monitor, regardless of how old
or new and should therefore work unless the cable is damaged or the monitor

Does this sound right?

Hoping that i can take it to a local pc store and just get them to plug it
into another comp to test it.

The error message was showing on comm port 8 for some reason......not sure
why as the monitor wasn't in that port or the touchscreen........now its not
showing as an error.


Thanks for the help

Zoe
 
When I Google for the model number of the monitor you specified it only
shows it as a standard 17 inch monitor and doesn't show where it would be a
touchscreen device. Are you sure you have the entire model number correct
for the monitor.

If the device, when plugged into a vga port on the computer with the
attached 15 pin VGA cable, doesn't show any bios information, but the
computer displays bios information with the other monitor, this one is
defective. IIRC all NEC monitors more than a few years old had a
permanently attached VGA cable (even back to the old EGA standard days.) The
documentation I found with the model you gave shows that the cable is
permanently attached. It could be a pin on the end of the cable or a broken
wire causing your problems. Make sure that all 15 pins (3 rows of 5 pins)
are straight up and intact.
 
zoepiglet said:
HI the monitor doesn't work no matter what screen setting its on before
plugging it in.........i obviously know the port is ok cos this one works
fine.

NEC powermate ML7 N8001

Surely if the monitor is working then plugging into the VGA whatever the
pixels it should show something?

This is what a friend had to say..................

'Even when the pc first boots ... regardless of the "pixel rate", bios
graphics are standard and will be read by any monitor, regardless of how old
or new and should therefore work unless the cable is damaged or the monitor

Does this sound right?

Hoping that i can take it to a local pc store and just get them to plug it
into another comp to test it.

The error message was showing on comm port 8 for some reason......not sure
why as the monitor wasn't in that port or the touchscreen........now its not
showing as an error.


Thanks for the help

Zoe
Click to expand...

According to this, the N8001 chipset is 915G, and there is one VGA connector
on the built-in graphics. If you have more than one graphics output,
then you must have a separate video card in the computer as well.
That would show up in Device Manager.

http://www.nec-computers.co.nz/About/Press_Details.asp?CID=9&PID=18

The BIOS will use something like 640x480 when it starts up. Many
monitors are "multisync", which is why they can operate with a
multitude of resolution settings.

This Ebay advert says the touchscreen monitor is 1024x768 max resolution.
You'd expect the V721 to support something like 640x480, 800x600, and
1024x768, at maybe 60Hz or more. If the V721 is connected to the
VGA port you normally use, you'd get to see it receiving the BIOS
screen output in a lower resolution, and the Windows resolution
when it is running at 1024x768 or one of the other settings listed
above.

http://cgi.ebay.com.au/NEC-17-CRT-M...34QQihZ015QQcategoryZ3695QQrdZ1QQcmdZViewItem

Video cards have the ability to detect the presence of a monitor
on the connector. On a video card with multiple video connectors,
the processor knows which ports have video connected, by using
the presence detection function. One way this works, is the RGB
signals place a 75 ohm load on the VGA connector, and that is
enough to convince the video card to put out a signal. I have
a "dummy connector", with 75 ohm resistors on the RGB signals,
and that is enough to convince a video card that a second
monitor is present.

The presence function doesn't work as well for TV output. Which is
why, the control panel for some video cards, have a "forcing"
function for TV screens. In that case, the theory is that the
TV is not being detected by its impedance, so they offer the user
the opportunity to keep the TV output enabled.

A second way that a video card gets information, is there is a
serial bus on the VGA connector. The "DDC DAT" and "DDC CLOCK"
shown in the VGA pinout, is how the computer asks the monitor
what resolutions it supports. Some monitors don't answer (because
they don't have any information stored in them), which makes it
harder to select resolutions for them sometimes. A "monitor
driver" can supply the missing EDID info, for the video card
software.

VGA pinout showing DDC signals:
http://www.bbdsoft.com/video.html

This program should show the EDID info, if a monitor is connected
to the VGA connector. See if both monitors are listed, when they
are both connected to your video card.

http://www.entechtaiwan.com/files/moninfo.exe

Have you ever tested that two monitors can work at the same time
on your computer ?

I see a couple possibilities:

1) Touchscreen monitor was damaged in transit. It should be
detected on the working VGA connector on your computer.
If either there is no EDID on the monitor, or the 75 ohm
loading of the touchscreen monitor is not detected, I suppose
those are possible reasons it is not working. I.e. the video
card may disable the output, if it thought there was no
monitor present.

2) You also need a way to verify that the video card supports
dual head, and both connectors work at the same time. The
Display control panel should have two monitor icons, if
they are both detected. The moninfo application may even
be able to display the EDID info, even if the second VGA
port is not delivering a video signal to it. The DAT and
CLOCK work independent of the RGB video part of the monitor.
So, if there was an EDID in both monitors, it is possible
there would be two menu items at the top of the "moninfo"
window.

If the video card is dual head, you may see two video
connectors on the faceplate of the card. When a video
card is present, on some computers that will disable the
VGA connector that is built-in to the motherboard. So
you might not expect the built-in one to have a signal,
while a separate video card is present. And that means,
the video card should have two usable connectors, if you
expect to run two monitors.

And by all means, take it to a local PC shop, as they should
have a working dual head video output to test with. It shouldn't
take them long to figure it out. They may end up asking to see
the PC as well, to configure the video card, or to check that
it really supports two monitors at the same time.

Paul
 
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