Screen flicker

[Black Baptist]

My screen has been flickering off and on for about 8 days now, I updated my
vid driver and checked all cables as well as for thermal cycling none appear
to be the culprit. Any ideas?

[Bob I]

LCD? Backlight starting to fail. CRT? Internal circuit failing, try
rapping in the back underside to see if it makes it blink.

Black Baptist wrote:

> My screen has been flickering off and on for about 8 days now, I updated my
> vid driver and checked all cables as well as for thermal cycling none appear
> to be the culprit. Any ideas?

[Jerry G.]

Before assuming the monitor to be defective, it is best to try another one
in its place. I have seen a defective display card cause its output to blank
out.

If it is an LCD type monitor, the back light, or ballast may be failing.
There can also be a defect that is causing the power supply to cycle, or go
in to protect.

In the CRT monitors, the CRT can be going weak, thus causing the AKG (Auto
Cathode to Grid Bias [ K is the symbol for cathode]) control circuits to be
going in to protect mode. When the CRT goes too weak, there is less load on
the anode supply, thus the high voltage may not regulate properly.

The AKG circuitry uses a set of bias circuits that are to control the grid
to cathode reference bias. It is commanded by the monitor's main uPC. This
is used to maintain the CRT's colour balance through its usable life span,
that has been set up at the factory. When you use your user colour balance,
you are introducing an offset from the factory reference that has been
programmed in as part of the firmware control. The CRT beam current is
measured as the CRT is operating. The AKG circuits will adjust the cathode
current to maintain the proper referenced current.

When the CRT goes weak, the beam current pull will get less. It can get to a
point where the AKG circuit system will run out of range. Also, if the beam
current goes too low, the high voltage may increase to be out of specs. The
high voltage regulation is referenced to the characterises of the CRT. When
the high voltage goes too high, there is a danger for X-Ray emission, and
this is the reason for the manufactures to set very strict standards.

In the CRT monitors, it is also possible to have various problems in the
protection circuits, CRT bias supplies, and power supply to also cause the
screen to cut out intermittently.

Cold solder connections in the various areas can also cause this type of
fault.

To service these types of problems, if it more than a simple connection or
cold solder, involved troubleshooting would be required, and also defective
component changes. If the CRT is faulty, this certainly would not be cost
effective.

If the monitor is defective, you can give it out for an estimate.
Considering if the monitor is more than about 3 to 4 years old, it is
usually not feasible to service. Also, the manufactures only supply parts
and service information to their authorized service reps. As for servicing
CRT type monitors, there is very little support these days. The cost of the
LCD monitors has dropped dramatically. The LCD monitors are superior in many
ways to a CRT type.

--


Greetings,

Jerry G.
============

"Black Baptist" > wrote in message
news:Xns962489D13FB80praythechurchcom@Letuspray...
> My screen has been flickering off and on for about 8 days now, I updated
my
> vid driver and checked all cables as well as for thermal cycling none
appear
> to be the culprit. Any ideas?

[Classic 42]

Try degaussing

[doS]

by the time he reads all of your reply the monitor will have failed...

"Jerry G." > wrote in message
...
>
> Before assuming the monitor to be defective, it is best to try another one
> in its place. I have seen a defective display card cause its output to
blank
> out.

[Classic 42]

ok, ok, only a suggestion. Just trying to help!! If you can find the answer
reply to the group, we would all like to know.
Classic

[Black Baptist]

Black Baptist rambled on in microsoft.public.windowsxp.help_and_support:

> My screen has been flickering off and on for about 8 days now, I updated my
> vid driver and checked all cables as well as for thermal cycling none
appear
> to be the culprit. Any ideas?
>

My speakers were to close to the monitor....just goes to show cheap speakers
can be a headache. Thanks all for your input though.

[Shaun]

Change the refresh rate to something besides 60.

"Black Baptist" > wrote in message
news:Xns962489D13FB80praythechurchcom@Letuspray...
> My screen has been flickering off and on for about 8 days now, I updated
my
> vid driver and checked all cables as well as for thermal cycling none
appear
> to be the culprit. Any ideas?

[Shaun]

degaussing would never cause such a thing.
"Classic 42" > wrote in message
...
> Try degaussing
>
>