PC Monitor "HourGlass"

[SteveJ34]

I've acquired quite a number of 14-15" monitors over the last couple of years, namely from repair/replace/upgrade of PCs for classrooms at my children's childcare facility along with friends/family/family friends.

I decided to test a number of these this evening to try and clear out what is not worth keeping.

I have a couple that are exhibiting what I call an "hourglass" display, that is, the sides are slightly curved inward like:

)  (

Understanding that I have more than what I would need for any immediate projects, should these just be pitched or is there some internal adjustment that might get these back to:

|   |

I look forward to any replies.

[sonicflood]

That's called pincushion.  Check the monitor for a pot (dial) on the back of the monitor for this adjustment.  Some old monitors had a hole in the back that you need to use a small screwdriver to access.

Also, here's a link to a downloadable program that is quite useful in calibrating a monitor.

Here's the link to get the program for free from Nokia: http://www.construnet.hu/nokia/Monitors/TEST/monitor_test.html

The program leads you through the following tests:

Geometric Tools: size, distortion (pincushion or barrel), tilt, trapezoid and orthogonality.

• Brightness / Contrast
• Convergence
• Focus
• Resolution
• Readability
• Moire
• Colors
• Screen regulation

Scott

[SteveJ34]

That's called pincushion.  Check the monitor for a pot (dial) on the back of the monitor for this adjustment.  Some old monitors had a hole in the back that you need to use a small screwdriver to access.
.....

The "pincushion" monitors in question are Apple Multisync 15AVs which I'm using an adaptor to get to a standard DB15 VGA connector.  

There were not adjustments beyond left/right,up/down externally. I popped the case and went  looking for other adjustment mechanisms of which there were several but found none that seemed to affect the pincushion problem.

I guess its possible there is not this type of adjustment available for this old monitor or perhaps this effect is being caused by the adaptor some way?

I don't recall seeing these issues when I shelved these units many moons ago (or I likely wouldn't have kept them at that time) but I have slept since then.

Any suggestions?

Steve

[Thenasty]

do like I did,, when you TEST and it don't come out right, GARBAGE, ( I wasted to much tim eon it before) if you need a 15" monitor, goto the surplus or cash converter store they have it for $5.00.