Old monitor only shows a vertical line... Fix?

[u_rebelscum]

My old monitor went bad, and before I buy a new one, I wonder if the problem is easy to fix.

Symptoms:
The old monitor now always shows a vertical line down the middle of the screen.  

It used to flip between this and a normal display; when it "went vertical", I could usually turn the monitor off then on, or wack it, and the picture would show up again.  (This was going on for about a month to 5 weeks.)  Degaussing did not help.

Before that, the monitor would sometimes "go on crack": The whole picture would display on the screen, but the horizontal lines would not line up with the lines above or below: a horizontal line that was mostly dark would usually be left of a lighter line, but even pure same color screens could form a wave.  This was a "standing wave", except when I moved the mouse vertically (the lines with the white mouse cursor would move further right if the cursor moved over anything darker), or a new web page displayed, or any other switch in the display.  The wave had about 1/2 an inch displacement from farthest left line to farthest right line.  I could usually get out of this by turning the monitor off then on, or squeezing the monitor case (in differing directions and sides).    Degaussing did not help.

Before that, I used to get moving waves when the monitor (and room) was cold.  The wave was simular to the above "standing wave" except this one changed very fast, and the colder it was, the more distance the lines could be displaced.  If I let the monitor warm up, it would go away.

IIRC, my monitor is ~7 years old (could be plus or minus a year).

Any ideas WTF is wrong with my monitor?

[rampy]

does it happen when you stand on one foot?

(just teasing, based upon the lenghts of "tricks" you used to get it to work in the past)

Is it a pc monitor or an arcade monitor?

The common response to this if it's an arcade monitor is to TRY: reflowing the solder joints (and while you already reflowing the soldering joints... go ahead and put a cap kit in...) (or is that versa vice?)

*Shrug* YMMV... as someone eloquently put it the other day in here re: cap kits, "they are the cure for the common cold" (some what facetiously)

Rampy

[OSCAR]

You have no vertical deflection.  Most common cause for this is a bad transistor in the vert drive circuit, or bad solder joints on the transistor(s).  If you can locate the vertical output transistors, resolder them like Rampy said.

[rampy]

I'm guessing based up on the news on the front page that it's your PC monitor that is giving you the blues...

in which case... I got nuthing.

rampy

[BobA]

You have no vertical deflection.  Most common cause for this is a bad transistor in the vert drive circuit, or bad solder joints on the transistor(s).  If you can locate the vertical output transistors, resolder them like Rampy said.

More then likely if you have a single vertical line, your horizontal output is gone not the vertical deflection.

BobA

[OSCAR]

More then likely if you have a single vertical line, your horizontal output is gone not the vertical deflection.

BobA

Depends which way the monitor is rotated, I guess.  

My vertical K4600 had the same problem, and it was vertical deflection.  But I guess if you are looking at it sideways, then it was a horizontal line, not vertical...

Robin didn't say which way the monitor was oriented, so I guess that info would help.

[u_rebelscum]

The monitor is (was) my everyday PC monitor, mounted normal (horizontally).  (iiyama w/ diamond-tron tube)

So that means the problem is with the horizontal output, right?  And if I go inside, I could try to find the horizontal transistors and stuff, and resolder them?

[BobA]

Ok now that we know you are talking a horiz screen.   You have a problem with your horiz output stage.

BobA

[u_rebelscum]

Thanks for clearing up my unclear problem.  
Still not fixed, but at least I know more about what's going on.

[PacManFan]

Thanks for clearing up my unclear problem.  
Still not fixed, but at least I know more about what's going on.

To try to find the problem, you can get a can of spray-freeze at radio shack or somewhere.
Most semiconductors will function again if you lower thier tempreture. Give the monitor a signal, and spray each transistor on the board, one at a time. When the picture appears correct, you've found the bad transistor.

-PMF

[u_rebelscum]

To try to find the problem, you can get a can of spray-freeze at radio shack or somewhere.
Most semiconductors will function again if you lower thier tempreture. Give the monitor a signal, and spray each transistor on the board, one at a time. When the picture appears correct, you've found the bad transistor.

-PMF

Thanks, I'll have to try that.

[paigeoliver]

I replaced those transistors on a TM 202 monitor as my first ever monitor repair. It was pretty easy, they were just little jobbers with 3 feet. Much easier than replacing some monster 24 pin IC. (Although for all I know yours has monster 24 pin ones).