Problem with monitor - turns off during bootup

[.:: Evanescence ::.]

Hi peoples.

I am having a problem with monitor, a Vision DX-1564 15" monitor - a very
unknown model.

Problem:

During boot-up the monitor acts as if it was on the Standby mode (no image,
power led flashing between orange and green). When something graphical is
load (ex. Windows boot logo), the monitor gives image again.

This is not very good as then I can't see error message and can't access BIOS
setup.

Question: What can be cause this problem?

Thanks.
and sorry for my bad english - I am Brazilian

 

[[email protected]]

Hi Evanescence,
Problem is not in your monitor, it is in your graphic card. I had the same
problem with a Matrox Millennium card, problem can be solved by finding and
flashing your graphic card boot program.
Wish you luck,
Dario

 

[Sam Goldwasser]

Could be in either place.

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[.:: Evanescence ::.]

Um vampiro chado [email protected] aterrorizava mulheres indefesas do
grupo sci.electronics.repair na data de 03 jul 2004:

Hi Evanescence,
Problem is not in your monitor, it is in your graphic card. I had the
same problem with a Matrox Millennium card, problem can be solved by
finding and flashing your graphic card boot program.

My video card is a S3 Trio 64V2 GX/DX video card, as reported by Windows'
device manager.

But I try other monitors and this does not happen

[]s

 

[Franc Zabkar]

Hi peoples.

I am having a problem with monitor, a Vision DX-1564 15" monitor - a very
unknown model.

Problem:

During boot-up the monitor acts as if it was on the Standby mode (no image,
power led flashing between orange and green). When something graphical is
load (ex. Windows boot logo), the monitor gives image again.

This is not very good as then I can't see error message and can't access BIOS
setup.

Question: What can be cause this problem?

Thanks.
and sorry for my bad english - I am Brazilian

Perhaps the fault is related to H/V sync polarities. It may be that in
"BIOS" mode one or both of the H&V inputs is a negative pulse. IME the
sync outputs of some older graphics cards cannot sink sufficient
current in the low state. This causes the monitor to believe there is
no sync, which then results in the monitor switching to power saving
mode. When Windows takes over, the sync polarities switch to positive
pulses, and the problem goes away.

I would monitor the H&V sync inputs with a scope. If the problem is as
described, then the solution may involve changing one or more resistor
or capacitor values in the monitor. Look for a 74LS86 IC near the VGA
connector. This IC was commonly used for auto-polarity conversion.
Each H&V input should be connected to an RC combination. Increasing
the value of R (and reducing C) should mitigate the drive requirements
for the graphics card.

See this post (S3 card and AOC monitor):
http://groups.google.com/[email protected]&output=gplain


- Franc Zabkar

 

[Art]

Try the monitor on another machine, if it still fails during the post and
boot then it's the monitor, otherwise it's the video card ++. Simplest test
with least $$ outlay. This will give you a firm answer, then you can address
the problem with at least a 50% chance of knowing where it exists. Could
even be in the BIOS setting, motherboard, or most probably the Video Card.
??Does your motherboard have an "on-board" video port? if so then remove the
video card, enter the BIOS and select the on-board video. Connect the
monitor to the "on-board" video port and check it's functions. Otherwise you
will need to either sub the video card, monitor, etc to diagnose the
problem. When/if you find out indeed that the problem's in the monitor then
you can get into in-depth diagnostics of that item.
Cheers Gov, hopefully this and other post give you a bit of headway rather
than a "walk-about', Eh.

 

[.:: Evanescence ::.]

Um vampiro chado Franc Zabkar <[email protected]> aterrorizava
mulheres indefesas do grupo sci.electronics.repair na data de 04 jul 2004:

I would monitor the H&V sync inputs with a scope. If the problem is as
described, then the solution may involve changing one or more resistor
or capacitor values in the monitor. Look for a 74LS86 IC near the VGA
connector. This IC was commonly used for auto-polarity conversion.
Each H&V input should be connected to an RC combination. Increasing
the value of R (and reducing C) should mitigate the drive requirements
for the graphics card.

I will check this, this may be the solution.

Thanks.

[]s

 

[.:: Evanescence ::.]

Try the monitor on another machine, if it still fails during the post
and boot then it's the monitor, otherwise it's the video card ++.
Simplest test with least $$ outlay.

It fails with this video card and with this monitor (AND condition - the two
ones are "linked").

??Does your motherboard have an "on-board"
video port? if so then remove the video card, enter the BIOS and select
the on-board video. Connect the monitor to the "on-board" video port and
check it's functions.

No onboard video. I load the default settings on BIOS setup to be check if it
was not an "Energy Saving" stuff.

Otherwise you will need to either sub the video
card, monitor, etc to diagnose the problem. When/if you find out indeed
that the problem's in the monitor then you can get into in-depth
diagnostics of that item. Cheers Gov, hopefully this and other post give
you a bit of headway rather than a "walk-about', Eh.

I will start checking the monitor.

[]s