Vertical line on sumsong monitor

[kofi Mpengya]

There is a vertical pal white line on my sumsong monitor. This line
divides the monitor into two with half the image on the screen mirrod
to the other side of the line. What can be the cause please.

 

[John Gill]

You have lost the horizontal sweep signal going to the yoke (on the
picture tube). I had one like that last week. The connector that connects
the yoke to the main circuit board had a burnt pin. I just removed that
section of the connector and soldered the corresponding wire directly to
the circuit board.
On many monitors, the horizontal sweep signal is part of the high-voltage
section and created by the HOT transistor. On other monitors, the horizontal
sweep is driven by a separate transistor, which will sometimes go bad
causing the vertical line.
John

 

[Art]

?? Loss of Horiz deflection producing a "mirror image" on the opposite side
of the screen?? Sounds like maybe a defective drive signal, resonate
component, etc. No Horiz deflection should either produce either a single
line down the centre of the screen or no brilliance on the screen at all
depending on the design and protection circuits.
"John Gill" <jdgill@juno.com> wrote in message
news:71016e83.0404210633.c233678@posting.google.com...

You have lost the horizontal sweep signal going to the yoke (on the
picture tube). I had one like that last week. The connector that connects
the yoke to the main circuit board had a burnt pin. I just removed that
section of the connector and soldered the corresponding wire directly to
the circuit board.
On many monitors, the horizontal sweep signal is part of the high-voltage
section and created by the HOT transistor. On other monitors, the
horizontal
sweep is driven by a separate transistor, which will sometimes go bad
causing the vertical line.
John

 

[Ken Weitzel]

Hi...

Wonder if "mirror" might be not quite the right word?

Maybe h freq has ended up such that it's producing
two "sort of identical" pictures side by side...

Ken

Art wrote:

?? Loss of Horiz deflection producing a "mirror image" on the opposite side
of the screen?? Sounds like maybe a defective drive signal, resonate
component, etc. No Horiz deflection should either produce either a single
line down the centre of the screen or no brilliance on the screen at all
depending on the design and protection circuits.
"John Gill" <jdgill@juno.com> wrote in message
news:71016e83.0404210633.c233678@posting.google.com...

You have lost the horizontal sweep signal going to the yoke (on the
picture tube). I had one like that last week. The connector that connects
the yoke to the main circuit board had a burnt pin. I just removed that
section of the connector and soldered the corresponding wire directly to
the circuit board.
On many monitors, the horizontal sweep signal is part of the high-voltage
section and created by the HOT transistor. On other monitors, the
horizontal
sweep is driven by a separate transistor, which will sometimes go bad
causing the vertical line.
John

 

[Art]

Correct, improper resolution setting may cause the "double" pictures, side
by side. This can be caused by improper setting at the computer or actual
sync processing circuits within the monitor. Connect the computer to another
monitor and check the different resolution settings to conform proper
operations at that point. Then again connect it to the same computer
starting at the lower resolution settings and advancing to higher levels
until you determine what the limits of the device are. If the limit of the
device have changed or the effect is always there irrelevant of resolution
then you will need to do in-depth troubleshooting within the monitor itself.
"Ken Weitzel" <kweitzel@shaw.ca> wrote in message
news:j4Bhc.201158$oR5.182008@pd7tw3no...

Hi...

Wonder if "mirror" might be not quite the right word?

Maybe h freq has ended up such that it's producing
two "sort of identical" pictures side by side...

Ken

Art wrote:
?? Loss of Horiz deflection producing a "mirror image" on the opposite
side of the screen?? Sounds like maybe a defective drive signal, resonate
component, etc. No Horiz deflection should either produce either a single
line down the centre of the screen or no brilliance on the screen at all
depending on the design and protection circuits.
"John Gill" <jdgill@juno.com> wrote in message
news:71016e83.0404210633.c233678@posting.google.com...

You have lost the horizontal sweep signal going to the yoke (on the
picture tube). I had one like that last week. The connector that connects
the yoke to the main circuit board had a burnt pin. I just removed that
section of the connector and soldered the corresponding wire directly to
the circuit board.
On many monitors, the horizontal sweep signal is part of the high-voltage
section and created by the HOT transistor. On other monitors, the
horizontal
sweep is driven by a separate transistor, which will sometimes go bad
causing the vertical line.
John