Jumpy display on Sony P1110

[isw]

Recently, my venerable P1110 has gotten "jumpy". The screen will begin
to get pincushion and "twitches" between a good display and the
distorted one. The distortion gets more severe and more frequent until
the deflection totally collapses and the monitor suddenly shuts off,
restarts, and goes back to the same thing. Or not. Sometimes the
twitching is incessant, sometimes it's not a problem for a few hours.

Because convergence and focus are fine during the "seizures", I suspect
a power supply problem in the deflection drivers.

Any suggestions or info on known problems? (This is the same model that
has a tendency to drift to higher and higher brightness -- I've already
dealt with that one).

Isaac

 

[Meat Plow]

On Thu, 30 Jul 2009 21:17:08 -0700, isw <isw@witzend.com>wrote:

Recently, my venerable P1110 has gotten "jumpy". The screen will begin
to get pincushion and "twitches" between a good display and the
distorted one. The distortion gets more severe and more frequent until
the deflection totally collapses and the monitor suddenly shuts off,
restarts, and goes back to the same thing. Or not. Sometimes the
twitching is incessant, sometimes it's not a problem for a few hours.

Because convergence and focus are fine during the "seizures", I suspect
a power supply problem in the deflection drivers.

Any suggestions or info on known problems? (This is the same model that
has a tendency to drift to higher and higher brightness -- I've already
dealt with that one).

Isaac

Take the back off and tap around the PSU/deflection with a non
conductive instrument and see if you can get the tapping to corrospond
with the image. If it's a loose solder connection good luck finding
it.

 

[isw]

In article <30riem.ogu.19.4@news.alt.net>,
Meat Plow <meat@petitmorte.net> wrote:

On Thu, 30 Jul 2009 21:17:08 -0700, isw <isw@witzend.com>wrote:

Recently, my venerable P1110 has gotten "jumpy". The screen will begin
to get pincushion and "twitches" between a good display and the
distorted one. The distortion gets more severe and more frequent until
the deflection totally collapses and the monitor suddenly shuts off,
restarts, and goes back to the same thing. Or not. Sometimes the
twitching is incessant, sometimes it's not a problem for a few hours.

Because convergence and focus are fine during the "seizures", I suspect
a power supply problem in the deflection drivers.

Any suggestions or info on known problems? (This is the same model that
has a tendency to drift to higher and higher brightness -- I've already
dealt with that one).

Isaac

Take the back off and tap around the PSU/deflection with a non
conductive instrument and see if you can get the tapping to corrospond
with the image. If it's a loose solder connection good luck finding
it.

Good idea. Sony has a long history of not knowing how to make reliable
solder joints.

Isaac

 

[Meat Plow]

On Fri, 31 Jul 2009 21:34:25 -0700, isw <isw@witzend.com>wrote:

In article <30riem.ogu.19.4@news.alt.net>,
Meat Plow <meat@petitmorte.net> wrote:

On Thu, 30 Jul 2009 21:17:08 -0700, isw <isw@witzend.com>wrote:

Recently, my venerable P1110 has gotten "jumpy". The screen will begin
to get pincushion and "twitches" between a good display and the
distorted one. The distortion gets more severe and more frequent until
the deflection totally collapses and the monitor suddenly shuts off,
restarts, and goes back to the same thing. Or not. Sometimes the
twitching is incessant, sometimes it's not a problem for a few hours.

Because convergence and focus are fine during the "seizures", I suspect
a power supply problem in the deflection drivers.

Any suggestions or info on known problems? (This is the same model that
has a tendency to drift to higher and higher brightness -- I've already
dealt with that one).

Isaac

Take the back off and tap around the PSU/deflection with a non
conductive instrument and see if you can get the tapping to corrospond
with the image. If it's a loose solder connection good luck finding
it.

Good idea. Sony has a long history of not knowing how to make reliable
solder joints.

Isaac

Yeah having done their warranty for a couple years that was evident
but that was a long time ago and not on computer monitors. Sony
monitors are usually reliable and run till the crt gun jumps the
shark.