Help : my monitor vibrates

  • Thread starter Thread starter abhi
  • Start date Start date
A

abhi

I use a 17" Samsung Flat CRT monitor.. i use it at 85Hz which is the
maximum it can support at 1024*768 resolution that i use.. Since a past
few months.. i have noticed that the text appearing on the screen at
the edges vibrates vigorously.. The text at the center of the screen is
absolutely sharp.. the problem is ony with the edges.. like the start
written on the start menu vibrates/shakes as it is located on the
bottom edge..

The monitor is 4yrs old... Do i need to change my monitor and get a new
one ???
 
abhi said:
I use a 17" Samsung Flat CRT monitor.. i use it at 85Hz which is the
maximum it can support at 1024*768 resolution that i use.. Since a past
few months.. i have noticed that the text appearing on the screen at
the edges vibrates vigorously.. The text at the center of the screen is
absolutely sharp.. the problem is ony with the edges.. like the start
written on the start menu vibrates/shakes as it is located on the
bottom edge..

The monitor is 4yrs old... Do i need to change my monitor and get a new
one ???
Click to expand...

A 17" CRT that tops-out at 1024x768 @ 85Hz was of marginal quality
when new. Sounds like upgrade time to me. 8)
 
abhi said:
I use a 17" Samsung Flat CRT monitor.. i use it at 85Hz which is the
maximum it can support at 1024*768 resolution that i use.. Since a past
few months.. i have noticed that the text appearing on the screen at
the edges vibrates vigorously.. The text at the center of the screen is
absolutely sharp.. the problem is ony with the edges.. like the start
written on the start menu vibrates/shakes as it is located on the
bottom edge..

The monitor is 4yrs old... Do i need to change my monitor and get a new
one ???
Click to expand...

Have you got any power supplys or power cables running near the monitor?

I had a similar problem with fuzzy text and found it was due to a plug in
p/s for another device. Once I'd relocated the p/s the text was normal.

HTH

Ian
 
abhi said:
I use a 17" Samsung Flat CRT monitor.. i use it at 85Hz which is the
maximum it can support at 1024*768 resolution that i use.. Since a past
few months.. i have noticed that the text appearing on the screen at
the edges vibrates vigorously.. The text at the center of the screen is
absolutely sharp.. the problem is ony with the edges.. like the start
written on the start menu vibrates/shakes as it is located on the
bottom edge..

The monitor is 4yrs old... Do i need to change my monitor and get a new
one ???
Click to expand...

It is quite likely that there is a bit more ripple on the driver voltage due to
age of the power supply in the monitor. Generally it's not something that is
worth troubleshooting/fixing. If it gets too annoying it's probably new monitor
time. I've had a couple of Trinitrons do that after running 24/7 for a number of
years. Generally the shake will be worse when the monitor is "cold" and it will
improve a small amount as it reaches normal operating temp.

Electrolytic caps dry out over time...which can cause output ripple to increase.
In turn the increased ripple/ripple current can cause the cap to run even warmer
thus increasing the potential of this failure mode I've noticed that they don't
make CRT's quite as well as they used to. From my experience 4 years seems to be
about the max they last these days. I still have some old 15+ year old Commodore
monitors that still work perfectly to this day. I use them for video/sat receiver
monitors next to my computer desks... Kinda crazy.


(*>
 
Hawk said:
It is quite likely that there is a bit more ripple on the driver voltage due to
age of the power supply in the monitor. Generally it's not something that is
worth troubleshooting/fixing. If it gets too annoying it's probably new monitor
time. I've had a couple of Trinitrons do that after running 24/7 for a number of
years. Generally the shake will be worse when the monitor is "cold" and it will
improve a small amount as it reaches normal operating temp.

Electrolytic caps dry out over time...which can cause output ripple to increase.
In turn the increased ripple/ripple current can cause the cap to run even warmer
thus increasing the potential of this failure mode I've noticed that they don't
make CRT's quite as well as they used to. From my experience 4 years seems to be
about the max they last these days. I still have some old 15+ year old Commodore
monitors that still work perfectly to this day. I use them for video/sat receiver
monitors next to my computer desks... Kinda crazy.


(*>
Click to expand...



thx a lot guys.. for all ur replies.. i think i'll go for a new monitor
!!!
 
Hawk said:
I've noticed that they don't
make CRT's quite as well as they used to.
Click to expand...

No question about that.
From my experience 4 years seems to be
about the max they last these days. I still have some old 15+ year old Commodore
monitors that still work perfectly to this day.
Click to expand...

Yeah, I have a 17" Nokia 447X that's over 10 years old and still works
great, although is losing some brightness. 'Course, it cost $900 -
one can't expect the same quality for $150 or whatever...
 
abhi said:
I use a 17" Samsung Flat CRT monitor.. i use it at 85Hz which is the
maximum it can support at 1024*768 resolution that i use.. Since a past
few months.. i have noticed that the text appearing on the screen at
the edges vibrates vigorously.. The text at the center of the screen is
absolutely sharp.. the problem is ony with the edges.. like the start
written on the start menu vibrates/shakes as it is located on the
bottom edge..

The monitor is 4yrs old... Do i need to change my monitor and get a new
one ???
Click to expand...
Probably just have it close to a magnetic field, like from a desktop
fluorescent lamp. Try moving things around a bit to see if it changes.
Sounds like beating between 60 Hz power magnetic field and the
85 Hz refresh rate.

HTH,
NGA
 
abhi said:
thx a lot guys.. for all ur replies.. i think i'll go for a new monitor
Click to expand...

Before you do that, trace out the cable coming from the vga connector on the
computer and follow it to the monitor and look _very_ carefully at anything
around it--the problem you are seeing is more likely to be caused by an
external source than the monitor failing--the most usual cause is the
ballast on a fluorescent light but potentially just about anything with a
transformer (including "wall-wart" power supplies) or motor (a desk or
floor fan for example) can cause it.
 
Hawk said:
It is quite likely that there is a bit more ripple on the driver
voltage due to age of the power supply in the monitor. Generally
it's not something that is worth troubleshooting/fixing. If it gets
too annoying it's probably new monitor time. I've had a couple of
Trinitrons do that after running 24/7 for a number of years. Generally the shake will be
worse when the monitor is "cold" and it
will improve a small amount as it reaches normal operating temp.
Electrolytic caps dry out over time...which can cause output ripple
to increase. In turn the increased ripple/ripple current can cause
the cap to run even warmer thus increasing the potential of this
failure mode I've noticed that they don't make CRT's quite as well
as they used to. From my experience 4 years seems to be about the
max they last these days. I still have some old 15+ year old
Commodore monitors that still work perfectly to this day. I use them
for video/sat receiver monitors next to my computer desks... Kinda crazy.
Click to expand...

Yeah, the 1701 lasts a very long time, hardly ever fail.

The 18* monitors were nowhere near as reliable tho.
 
Back
Top