My monitor screen shakes

[frank]

Need some advice here please. Just bought a new samsung syncmaster 763MB a
2-3 months ago. Since then, I've always had this shaking happening in the
upper half of the screen once in a while. I'm pretty sure it has to do with
noise in my own home's electrical circuit. Now what i'd like to know is,
would a UPS solve this noise or whatever fluctuation it is. If so, what type
of UPS would you recommend. Or could it also just be my monitor having this
trouble? Any ways to test it at home?
thanks all
Frank

 

[Gareth Tuckwell]

Need some advice here please. Just bought a new samsung syncmaster 763MB a
2-3 months ago. Since then, I've always had this shaking happening in the
upper half of the screen once in a while. I'm pretty sure it has to do
with
noise in my own home's electrical circuit. Now what i'd like to know is,
would a UPS solve this noise or whatever fluctuation it is. If so, what
type
of UPS would you recommend. Or could it also just be my monitor having
this
trouble? Any ways to test it at home?
thanks all
Frank

Can't comment on the UPS solution, but perhaps it is something more simple -
do you have a desk lamp near the screen. The reading lamp I have makes the
screen flicker if it is within a few inches of the screen as the transformer
is built-in to the base! How about speakers - anything too close to the
screen? How about another screen or TV to close - perhaps up agains the wall
in the next room??

 

[frank]

Yeah, actually I have tried all these solutions and I did unplug my desk
lamp for a while. When I do turn on the lamp, I get a bit more flickering
than usual. As for speakers, they are at least 2 feet away from the screen
and I would have trouble explaining how if the speakers are off, even
unplugged for the day that I would get flickering during the day. But still
thanks for the info.
One of the reasons that kinda makes me believe it's really my own electric
network is that whenever the microwave is used, it does flicker. However, it
does not necessarily stop when the microwave stops and it will flicker even
without the microwave. So, still not sure about the cause..

 

[Brian Grant]

Is your power receptacle grounded?

Yeah, actually I have tried all these solutions and I did unplug my desk
lamp for a while. When I do turn on the lamp, I get a bit more flickering
than usual. As for speakers, they are at least 2 feet away from the screen
and I would have trouble explaining how if the speakers are off, even
unplugged for the day that I would get flickering during the day. But still
thanks for the info.
One of the reasons that kinda makes me believe it's really my own electric
network is that whenever the microwave is used, it does flicker. However, it
does not necessarily stop when the microwave stops and it will flicker even
without the microwave. So, still not sure about the cause..

 

[frank]

yeah, I guess. That would be the copper wire going to the metal housing.

 

[Clark]

Have you Degaussed lately?

Clark

yeah, I guess. That would be the copper wire going to the metal housing.

 

[frank]

Everytime I turn on my monitor, it degausses itself, and even after a manual
degauss, it doesn't change anything. Basically one minute everything is fine
and then for no reasons that I know of, it starts to shake. It will stop
after some time again for no reasons yet known.

 

[kony]

Everytime I turn on my monitor, it degausses itself, and even after a manual
degauss, it doesn't change anything. Basically one minute everything is fine
and then for no reasons that I know of, it starts to shake. It will stop
after some time again for no reasons yet known.

Anything (else) noisey on same AC circuit? If so you might
try moving monitor to another circuit.

Anything on other side of wall or in wall behind monitor?

You might also try rotating the monitor.
If it always completely stops after the monitor warms up,
might be a bad solder joint or marginal capacitor.

The following might be overkill but the price is right:
http://www.mpja.com/viewallpict.asp?dept=380&main=1

 

[frank]

Anything (else) noisey on same AC circuit? If so you might
try moving monitor to another circuit.

Tried that on an electric outlet where nothing else was on it (seperate
circuit breaker) but still changed nothing.

Anything on other side of wall or in wall behind monitor?

That would be my next door neighbor. But I do know she has no big
speakers and her TV is not in that room next to me.

You might also try rotating the monitor.

Actually this did make a huge difference. It's so stupid but rotating
my monitor about 30-40degrees counterclockwise stopped the shaking. Now all
I have is a very small almost unnoticable shake which almost looks like a
refresh rate not high enough, yet I'm at 85hz. But I can't use my monitor if
I leave it rotated that way anyhow but yeah, that did help a lot. Now, I
need to find how come unless anyone of your here have any idea. This atleast
kinda put's away my theory of electric noise in my circuit. Thanks for that
suggestion Kony. I would not consider my problem 100% solved, but now, I
could live with that anyhow and just forget about it. If only I knew before
a slight rotating would do the trick.
Well now, just need to find what's happening when I rotate my screen and go
from there.
thanks man

If it always completely stops after the monitor warms up,
might be a bad solder joint or marginal capacitor.

Cold or after 24hrs, no difference

The following might be overkill but the price is right:
http://www.mpja.com/viewallpict.asp?dept=380&main=1

I was actually looking into a UPS which would somehow have that kind of
use integrated into the UPS. If it exists. But like I said above, I might
not need this afterall.

 

[kony]

Actually this did make a huge difference. It's so stupid but rotating
my monitor about 30-40degrees counterclockwise stopped the shaking. Now all
I have is a very small almost unnoticable shake which almost looks like a
refresh rate not high enough, yet I'm at 85hz. But I can't use my monitor if
I leave it rotated that way anyhow but yeah, that did help a lot. Now, I
need to find how come unless anyone of your here have any idea. This atleast
kinda put's away my theory of electric noise in my circuit. Thanks for that
suggestion Kony. I would not consider my problem 100% solved, but now, I
could live with that anyhow and just forget about it. If only I knew before
a slight rotating would do the trick.
Well now, just need to find what's happening when I rotate my screen and go
from there.
thanks man

It's possible that moving the monitor has flexed the circuit
board ever so slightly and made a bad solder joint, a little
bit better momentarily, but in that case it'd probably recur
intermittently.

More likely is that you have another source of
electromagnetic interference, like a power brick nearby, or
perhaps going up (in) the wall.

 

[frank]

It's possible that moving the monitor has flexed the circuit
board ever so slightly and made a bad solder joint, a little
bit better momentarily, but in that case it'd probably recur
intermittently.

More likely is that you have another source of
electromagnetic interference, like a power brick nearby, or
perhaps going up (in) the wall.

I would guess it would not have to do with anything moving in the monitor as
when the shaking does occur, I can stop and start it whenever I want just by
rotating the monitor. But then again, for some reason, it does not shake all
the time. Having some source of electromagnetic interference is probably
more plausible. Would you have any idea on how I could measure this or
somehow to remedy this?
thanks again

 

[kony]

I would guess it would not have to do with anything moving in the monitor as
when the shaking does occur, I can stop and start it whenever I want just by
rotating the monitor. But then again, for some reason, it does not shake all
the time. Having some source of electromagnetic interference is probably
more plausible. Would you have any idea on how I could measure this or
somehow to remedy this?
thanks again

Have a compass handy? Magnetized needle on a string?
Throw a bucket of iron dust into the air?
Something along those lines if you don't happen to have EM
field detection equipment which I'd suppose you'd have
already used.

 

[kony]

I would guess it would not have to do with anything moving in the monitor as
when the shaking does occur, I can stop and start it whenever I want just by
rotating the monitor. But then again, for some reason, it does not shake all
the time. Having some source of electromagnetic interference is probably
more plausible. Would you have any idea on how I could measure this or
somehow to remedy this?
thanks again

Another option is to unplug everything from AC but system
and monitor.

 

[frank]

thanks for the info. I'll try that to do one of these during the weekend.
What I've just realsied now however is when I rotate my monitor, yes is
stops flickering/shaking at the top like it use to, but now, when I look at
the bottom of my screen, that part is now shaking. It's really crazy. Either
the top or bottom shakes depending on hoe my monitor is oriented.
Talk about crazy stuff. Anyway, i'll see what I can do to test this with
what you've suggested.
thanks again

Frank

 

[Luis ORTEGA]

my monitor used to shake when it was situated near the tower case. when i
got a tower case with a see-through sides, it shook even worse. when i moved
them far enough apart, it stopped shaking.