For Franc Zabkar: Recurring Monitor Problem

Per Glen Ventura's suggestion, I'm posting this issue here.

We have an old Cybervision 19-inch monitor. The problem we have is that on
a recurring basis (it started closed to a year ago) the display is
compressed into a horizontal line with the rest of the screen black. My son
found out that if we tap the top of the monitor, that fixes the problem.
Would anyone know what part(s) inside the monitor could be causing this?
--
{ : [|]=( DaffyD®

If I knew where I was I'd be there now.

On Tue, 29 Jan 2008 20:08:03 -0800, "DaffyD®"
wrote:

Per Glen Ventura's suggestion, I'm posting this issue here.

We have an old Cybervision 19-inch monitor. The problem we have is that on
a recurring basis (it started closed to a year ago) the display is
compressed into a horizontal line with the rest of the screen black. My son
found out that if we tap the top of the monitor, that fixes the problem.
Would anyone know what part(s) inside the monitor could be causing this?

Loose/dirty contact or broken connector pin in crt base harnessing and
connectors.

RL

On Tue, 29 Jan 2008 20:08:03 -0800, "DaffyD®" put
finger to keyboard and composed:

Per Glen Ventura's suggestion, I'm posting this issue here.

We have an old Cybervision 19-inch monitor. The problem we have is that on
a recurring basis (it started closed to a year ago) the display is
compressed into a horizontal line with the rest of the screen black. My son
found out that if we tap the top of the monitor, that fixes the problem.
Would anyone know what part(s) inside the monitor could be causing this?

The problem is called "vertical collapse". It sounds like you have a
dry/cold solder joint in the vertical deflection circuit. It should be
an easy fix if you're handy with a soldering iron. Just follow the
4-wire cable from the deflection yoke on the picture tube back to the
circuit board. Two of those wires (usually the thinner ones) will go
to the vertical output IC (usually on a heatsink). Resolder any
suspect components in that area. A tap test with an insulated
screwdriver handle, or a blast of spray freeze, may help identify the
culprit. Also change any bulging caps.

IMO the best forum for this type of question is
sci.electronics.repair. This is their FAQ:

http://www.repairfaq.org/REPAIR/

This is your problem (Single Horizontal Line):
http://www.repairfaq.org/samnew/tvfaq/tvsinghli.htm
http://www.repairfaq.org/sam/monfaq.htm#monsinghor

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

Ditto exactly what Franc suggests. You've lost your "Vertical Output".. If
tapping the monitor can restore the display, the problem is probably not
very serious. Franc's troubleshooting advice/procedure is excellent, and
right on the money.

Good luck.


--
HTH,

Curt

http://dundats.mvps.org/
http://www.aumha.org/


"Franc Zabkar" wrote in message
...
On Tue, 29 Jan 2008 20:08:03 -0800, "DaffyD®" put
finger to keyboard and composed:

Per Glen Ventura's suggestion, I'm posting this issue here.

We have an old Cybervision 19-inch monitor. The problem we have is that
on
a recurring basis (it started closed to a year ago) the display is
compressed into a horizontal line with the rest of the screen black. My
son
found out that if we tap the top of the monitor, that fixes the problem.
Would anyone know what part(s) inside the monitor could be causing this?

The problem is called "vertical collapse". It sounds like you have a
dry/cold solder joint in the vertical deflection circuit. It should be
an easy fix if you're handy with a soldering iron. Just follow the
4-wire cable from the deflection yoke on the picture tube back to the
circuit board. Two of those wires (usually the thinner ones) will go
to the vertical output IC (usually on a heatsink). Resolder any
suspect components in that area. A tap test with an insulated
screwdriver handle, or a blast of spray freeze, may help identify the
culprit. Also change any bulging caps.

IMO the best forum for this type of question is
sci.electronics.repair. This is their FAQ:

http://www.repairfaq.org/REPAIR/

This is your problem (Single Horizontal Line):
http://www.repairfaq.org/samnew/tvfaq/tvsinghli.htm
http://www.repairfaq.org/sam/monfaq.htm#monsinghor

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

I replied to your same note in the Windows 98 Display section ... please read
it. One must be careful when opening monitors to avoid electrocution.
- BR -

"DaffyD®" wrote:

Per Glen Ventura's suggestion, I'm posting this issue here.

We have an old Cybervision 19-inch monitor. The problem we have is that on
a recurring basis (it started closed to a year ago) the display is
compressed into a horizontal line with the rest of the screen black. My son
found out that if we tap the top of the monitor, that fixes the problem.
Would anyone know what part(s) inside the monitor could be causing this?
--
{ : [|]=( DaffyD®

If I knew where I was I'd be there now.