For Franc Zabkar: Recurring Monitor Problem

[Guest DaffyD®]

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.

[Guest legg]

Re: For Franc Zabkar: Recurring Monitor Problem

 

On Tue, 29 Jan 2008 20:08:03 -0800, "DaffyD®" <daffyd@woohoo.com>

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

[Guest Franc Zabkar]

Re: For Franc Zabkar: Recurring Monitor Problem

 

On Tue, 29 Jan 2008 20:08:03 -0800, "DaffyD®" <daffyd@woohoo.com> 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.

[Guest Curt Christianson]

Re: For Franc Zabkar: Recurring Monitor Problem

 

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" <fzabkar@iinternode.on.net> wrote in message

news:70g1q39n6vlkqgcuitu3d82e90vlpokbfi@4ax.com...

> On Tue, 29 Jan 2008 20:08:03 -0800, "DaffyD®" <daffyd@woohoo.com> 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.

[Guest buffalo rider]

RE: For Franc Zabkar: Recurring Monitor Problem

 

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.

>

>

>